Carnotite resources of the Georgetown group of claims, San Miguel County, Colorado
Alfred Lerner Bush, L.S. Hilpert, R. D. Trace
1950, Trace Elements Investigations 116
No abstract available....
Carnotite resources of the Ellison and Burro claims, San Miguel County, Colorado
Charles Francis Withington, Alfred Lerner Bush
1950, Trace Elements Investigations 115
No abstract available....
What counts in a more-game program?
D.L. Allen
1950, Wisconsin Conservation Bulletin (15) 3-13
Gadwall nesting in Maryland
P. F. Springer, R. E. Stewart
1950, The Auk (67) 234-235
Toxicity and repellency to rats of actidione
R. Traub, J.B. DeWitt, J.F. Welch, D. Newman
1950, Journal of the American Pharmaceutical Association, Scientific Edition (39) 552-555
The antibiotic actidione was found to be highly repellent to laboratory rats and to significantly reduce gnawing attacks upon treated paperboards. Rats refused to accept food or water containing this material even under conditions of acute starvation and died of starvation and thirst rather than accept water containing 1.0 mg. of...
[Book review] The Saga of the Waterfowl, by Martin Bovey
R. E. Stewart
1950, Atlantic Naturalist (5) 235-236
Fourteenth breeding-bird census. 22. General farm land
R. E. Stewart, M.B. Meanley
1950, Audubon Field Notes (4) 305
Rat deterrents for paper packages
J.F. Welch, J.B. DeWitt, E. Bellack
1950, Soap and Sanitary Chemicals (26) 122-124,
A report of the study to develop a treatment for paper and fabricating materials which will prevent or minimize damage be commensal rodents to stored package goods....
Birds of the season
C.S. Robbins
1950, Wood Thrush (5) 126-127
Notes on some winter birds of north central New Mexico
R. W. Allen
1950, The Auk (67) 252-253
The observations recorded below were made in Santa Fe, Sandoval and Rio Arriba counties during the winter of 1939-1940. Occasional specimens, 54 in all, collected for racial identification, are deposited in the Museum of Zoology, University of Michigan....
Black vultures in western Pennsylvania
C.S. Robbins
1950, The Wilson Bulletin (62) 36
The season--November and December, 1949
C.S. Robbins
1950, Maryland Birdlife (6) 12-15
Preliminary map showing the winter distribution of the clapper rail (Rallus longirostris subsp.) in the United States
C.S. Robbins
1950, Audubon Field Notes (4) 307
Snowy owls were recorded on 58 Christmas counts this year [map]
C.S. Robbins
1950, Audubon Field Notes (4) 65
The season--March and April, 1950
C.S. Robbins
1950, Maryland Birdlife (6) 38-43
The season--January and February 1950
C.S. Robbins
1950, Maryland Birdlife (6) 30-34
Definite common names for species--an editorial policy
J.W. Aldrich
1950, Audubon Field Notes (4) 36-39
Fiftieth Christmas bird count. A summary of largest counts of individuals
C.S. Robbins
1950, Audubon Field Notes (4) 179-182
Red-winged blackbird fourteen years old
S.H. Low
1950, Bird-Banding (21) 115-115
No abstract available. ...
Birds of the season
C.S. Robbins
1950, Atlantic Naturalist (5) 185
Birds of the season
C.S. Robbins
1950, Atlantic Naturalist (5) 227-228
Island pheasant festival
D.L. Allen
1950, Outdoor Life (105) 34
Fantastic shooting, full bags are a joy to sportsmen, and a boon to researchers trying to find out what makes Pelee tick. [Pelee is a Canadian island in Lake Erie, 20 miles north of Sandusky, OH.]...
Sportsmen: Are you being shortchanged?
D.L. Allen
1950, Outdoor Life (106) 64-65
DDT: Its effects on beneficial life
J.P. Linduska
1950, Garden Club of America Bulletin (38) 76-82
Phosphorus poisoning in waterfowl
D. R. Coburn, J.B. DeWitt, J.V. Derby Jr., E. Ediger
1950, Journal of the American Pharmaceutical Association, Scientific Edition (39) 151-158
Black ducks and mallards were found to be highly susceptible to phosphorus poisoning. 3 mg. of white phosphorus per kg. of body weight given in a single dose resulted in death of a black duck in 6 hours. Pathologic changes in both acute and chronic poisoning were studied. Data are...