References
- NAC News 1968; 27(1)8–9
- Rappolt R. T., Sr. Pesticides Symposia, W. B. Deichmann. Halos and Assoc. Inc., Miami, Fla. 1970; 269–271
- Audubon Magazine. 1942, 42nd Christmas Bird Count
- Audubon Field Notes. 1961, 61st Christmas Bird Count
- U.S. Bureau Sports Fisheries and Wildlife Resources. Publ. No. 34, July, 1966
- Wurster C. Science March, 1968
- Broecker W. S. Man's oxygen reserves. Science 1970; 168: 1537–1538
- Sobelman M. Statement to Interim Committee of Nebraska State Legislature, DDT and the environment. January, 1970
- Shaw W. C. NAC News 1969; 27(6)3