Primitive and contaminated basalts from the Southern Rocky Mountains, U.S.A
B. R. Doe, P. W. Lipman, C. E. Hedge, H. Kurasawa
1969, Contributions to Mineralogy and Petrology (21) 142-156
Basalts in the Southern Rocky Mountains province have been analyzed to determine if any of them are primitive. Alkali plagioclase xenocrysts armored with calcic plagioclase seem to be the best petrographic indicator of contamination. The next best indicator of contamination is quartz xenocrysts armored with clinopyroxene. On the rocks and...
Crystal structure of howlite, Ca2SiB5O9(OH)5
J.J. Finney, I. Kumbasar, J. R. Clark
1969, Die Naturwissenschaften (56) 33-34
[No abstract available]...
History of the geomagnetic field
Richard R. Doell
1969, Journal of Applied Physics (40) 945-954
Direct measurements of the direction and strength of the earth's magnetic field have provided a knowledge of the field's form and behavior during the last few hundreds of years. For older times, however, it has been necessary to measure the magnetism of certain rocks to learn what the geomagnetic field was like. For example, when a...
More on the paradise crane
C.S. Robbins
1969, Maryland Birdlife (25) 127
[Book review] Wild Turkey Diseases and Parasites, by M.H. Markley
C. M. Herman
1969, Bulletin of the Wildlife Disease Association (5) 10-10
No abstract available....
[Book review] Extinct and Vanishing Birds of the World, by J.C. Greenway, Dover Publications, New York, NY, 520 pp
R.C. Erickson
1969, Journal of Wildlife Management (33) 726-727
[Book review] Wagstaffe, R. and J. H. Fidler. The Preservation of Natural History Specimens. Vol. 2, Philosophical Library. 1968. 404 pp
Richard C. Banks
1969, Atlantic Naturalist (24) 54
Let's save the dusky seaside sparrow
Brian Sharp
1969, Florida Naturalist (42) 68-70
Four-year summary of the Breeding Bird Survey in Maryland
C.S. Robbins
1969, Maryland Birdlife (25) 29-36
[Book review] A field guide to the birds of New Zealand and outlying islands
Chandler S. Robbins
1969, The Auk (86) 579-580
This field guide is so closely patterned after the familiar Peterson style that it may best be described in terms of its departures from that style. Color plates are disappointingly few. They depict: Penguin heads, parrots and kingfisher, eight species of ducks, a pigeon and seven species of native songbirds,...
[Book review] Ornithology: an Introduction, by Austin L. Rand
C.S. Robbins
1969, The Quarterly Review of Biology (44) 95
The Breeding Bird Survey in Georgia, 1967-1969
W.T. Van Velzen
1969, Oriole (34) 71-76
Rediscovery of the nesting grounds of the Newell's manx shearwater (Puffinus puffinus newelli), with initial observations
J.L. Sincock, G.E. Swedberg
1969, Condor (71) 69-71
No abstract available....
California condor surveys, 1968
F.C. Sibley, R.D. Mallette, J.C. Borneman, R.S. Dalen
1969, California Fish and Game (55) 298-306
The Breeding Bird Survey in Virginia, 1966-1968
W.T. Van Velzen
1969, Raven (40) 3-9
The season - April, May, June, 1969
C.S. Robbins
1969, Maryland Birdlife (25) 92-100
The season - January, February, March, 1969
C.S. Robbins
1969, Maryland Birdlife (25) 61-63
The season - July, August, September, 1969
C.S. Robbins
1969, Maryland Birdlife (25) 129-136
Operation recovery in Maryland in 1969
C.S. Robbins
1969, Maryland Birdlife (25) 120-127
Sixty-ninth Christmas bird count. 299. Little Creek, Va
P.W. Sykes Jr.
1969, Audubon Field Notes (23) 219-220
Sixty-ninth Christmas bird count. 288. Back Bay National Wildlife Refuge, Va
P.W. Sykes Jr.
1969, Audubon Field Notes (23) 214-215
Residues in two bald eagles suspected of pesticide poisoning
W. L. Reichel, T. G. Lamont, E. Cromartie, L. N. Locke
1969, Bulletin of Environmental Contamination and Toxicology (4) 24-30
No abstract available....
Maryland Birdlife index, volumes 21-25, 1965-1969. Part 1, Species Index; part 2, Author index
W.T. Van Velzen, A.C. Van Velzen
1969, Maryland Birdlife (25) 149-168
[Book review] Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies
Richard C. Banks
1969, The Auk (86) 768-770
The completion of an ornithological series as important as the Bent Life Histories is an exciting event. Here is a series of 21 volumes, spanning a history of nearly 60 years from inception to completion, containing over 9,500 text pages of information about North American birds, largely the work of...
Pesticide residues in eagles
W. L. Reichel, E. Cromartie, T. G. Lamont, B.M. Mulhern, R. M. Prouty
1969, Pesticides Monitoring Journal (3) 142-144
Bald and golden eagles found sick or dead in 18 States and Canada during 1964-1965 were analyzed for pesticide residues. Residues in bald eagles were considerably higher than in golden eagles. Residues of DDE, DDD, and dieldrin were detected in all samples of bald eagle carcasses; other compounds...
