1. Eggshell changes in certain North American birds;Anderson,1972
2. Brown pelicans: Improved reproduction off the southern California coast;Anderson;Science,1975
3. Analysis of polychlorinated biphenyls (PCB) by glass capillary chromatography;Ballschmiter;Fres. Z. Anal. Chem.,1980
4. Residue levels of environmental contaminants in prey species of the peregrine falcon, Falco peregrinus, in Canada;Baril;Canadian Field-Naturalist,1990
5. Migration counts of raptors at Hawk Mountain, Pennsylvania, as indicators of population trends, 1934–1986;Bednarz;Auk,1990