Summary of Maryland nest records, 1949
C.S. Robbins
1949, Maryland Birdlife (5) 41-48
Forty-ninth Christmas Bird Count
C.S. Robbins
1949, Audubon Field Notes (3) 35-38
The season--September and October, 1949
C.S. Robbins
1949, Maryland Birdlife (5) 56-58
Thirteenth breeding-bird census. 8. Red pine plantation
C.S. Robbins, I.R. Barnes
1949, Audubon Field Notes (3) 258
Weather and bird migration
C.S. Robbins
1949, Wood Thrush (4) 130-144
The season--January-February 1949
C.S. Robbins
1949, Maryland Birdlife (5) 21-23
Thirteenth breeding-bird census. 7. Virgin hemlock forest
C.S. Robbins
1949, Audubon Field Notes (3) 257-258
The distribution of Maryland birds
R. E. Stewart
1949, Maryland Birdlife (5) 2
Thirteenth breeding-bird census. 24. Open hemlock-spruce bog
C.S. Robbins
1949, Audubon Field Notes (3) 269
Winter bird-population study: 16. Damp deciduous scrub with standing dead trees
C.S. Robbins
1949, Audubon Field Notes (3) 194-195
Klebsiella ozaenae infection of mink
J.A. Morris, E. R. Quortrup
1949, Journal of the American Veterinary Medical Association (111) 50-51
Thirteenth breeding-bird census. 10. Mature and lumbered oak-maple ridge forest
C.S. Robbins
1949, Audubon Field Notes (3) 259-261
Distribution of North American birds. The breeding distribution of the Virginia rail
C.S. Robbins
1949, Audubon Field Notes (3) 238-239
Birds of the marshes
R. E. Stewart
1949, Wood Thrush (4) 92-99
DDT and the balance of nature
J.P. Linduska
1949, Proceedings and Papers of the International Technical Conference on the Protection of Nature (1) 363-371
White-crowned sparrows wintering in Maryland and West Virginia
L. M. Llewellyn
1949, The Auk (66) 96-96
During the Christmas holidays (1947) five white-crowned sparrows (Zonotrichia l. leucophrys) were trapped and banded at McCoole, Allegany County, Maryland. On January 31 and February 1, 1948, 11 more were banded and a flock of at least 21 white-crowns was counted feeding in the snow under pigweed (Amaranthus hybridus)....
Birds of the ponds and rivers
S.H. Low
1949, Wood Thrush (4) 145-149
Rodent-repellent studies. I. Method for the evaluation of chemical repellents
E. Bellack, J.B. DeWitt
1949, Journal of the American Pharmaceutical Association (38) 109-112
A biological assay procedure and a method for the numerical expression of results have been devised for the determination of the repellency to rodents of different chemical compounds. The procedure is based upon the degree of acceptability of foods containing the candidate repellents, and has been shown to offer a...
More (expensive) quail through predator control
J.P. Linduska
1949, Missouri Quail Hunter (4) 7, 11
Where do we stand on artificial restocking?
D.L. Allen
1949, Virginia Wildlife (10) 16-18
Operation drainpipe
D.L. Allen
1949, Field and Stream (54) 60, 126-128
The bounty system doesn't work....
Populations and home range relationships of the box turtle, Terrapene carolina (Linnaeus)
L.F. Stickel
1949, Dissertation Abstracts International (9) 195
A population study of Terrapene carolina (Linnaeus) was made at the Patuxent Research Refuge, Maryland, from 1944 to 1947. A thirty acre area in bottomland forest was selected for intensive study. Turtles were marked by filing notches in marginal scutes according...
An experiment with snake trapping
L.M. Dargan, W. H. Stickel
1949, Copeia (1949) 264-268
No abstract available....
Calcium and phosphorus requirements of breeding bobwhite quail
J.B. DeWitt, R. B. Nestler, J.V. Derby Jr.
1949, Journal of Nutrition (39) 567-577
In the course of studies designed to determine the calcium and phosphorus requirements of breeding bobwhite quail, it was found that best results were obtained when the Ca/P ratio in the diet was approximately 2.3:1. Variations in the Ca/P ratio produced significant differences in results when the level...
Rodent-repellent studies. III. Advanced studies in the evaluation of chemical repellents
E. Bellack, J.B. DeWitt
1949, Journal of the American Pharmaceutical Association, Scientific Edition (39) 197-202
In order to bridge the gap between preliminary screening of chemicals for potential rodent repellency and the application of these compounds to paper cartons, more advanced studies in the evaluation of promising materials have been carried out. These studies have resulted in: (1) a modification of the food acceptance technique...