PAYNTER, RAYMOND A., JR. 
197. The fate of banded Kent Island herring gulls. Bird-Banding, 
18(4.) 3156-170. 
1949. Clutch-size and the egg and chick mortality of Kent Island 
herring gulls. Ecology, 30(2):1)6-166. 
PEARL, RAYMOND 
1941. An introduction to medical biometry and statistics. 3rd 
ed. Phila.: W. B. Saunders Co. xv + 537pp. 
PEARL, RAYMOND and JOHN R. MINER 
1935. Experimental studies on the duration of life. XIV The 
comparative mortality of certain lower organisms. Quart. 
Rev. Biol., 10(1):60-79. 
PEARL, RAYMOND and SYLVIA L. PARKER 
1921. Experimental studies on the duration of life. I. Intro- 
ductory discussion of the duration of life in Drosophila. 
Amer. Nat., 553181-509. a. ion 
PEARSON, ALLEN M. and GEORGE C. MOORE 
1939. Nesting habits of the mourning dove in Alabama. Trans. 
Fourth No. Amer. Wildl. Conf., pp.68-h73. 
PEARSON, ALLEN M. and WALTER ROSENE, JR. 
1938. Observations on the breeding season of the mourning dove 
in the South. Trans. Third N.A. Wildl. Conf., pp.865-868. 
PEARSON, KARL 
1902. On the change in expectation of life in man during a 
period of circa 2000 years. Biometrika, 1:261-26). 
PERRY, J. S. 
1945. The reproduction of the wild brown rat (Rattus norvegicus 
Erxleben). Proc. Zool. Soc. London, 195, Series B, 219-16. 
PHILLIPS, JOHN C. and FREDERICK C. LINCOLN 
1930. American waterfowl, their present situation and the outlook 
for their future. Cambridge, Mass.:; Houghton, Mifflin Co. xv + 
312pp. 
POOR, HUSTACE H. 
1943. Color-banded immature herring gulls in the New York region. 
Bird-Banding, 14():101-115. 
ROBBINS, CHANDIER S. 
1949. Migration of the redhead. In Migration of some North 
American waterfowl / A progress report on an analysis of 
banding records. Special Sci. Rept. (Wildlife) No. 1, U. S. 
Dept. Interior, Fish and Wildlife Serv., pp.25-28, l pl. 
ROBERTS, THOMAS S. 
1932. The birds of Minnesota. Vol. 1. Minneapolis: Univ. of 
Minn. Press. xxii + 69lpp. 3 
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