Editore: Minneapolis: University of Minnesota Press, . First edition., 1961
Da: Natural History Books, Iowa City, IA, U.S.A.
Pp. viii, 51; frontispiece black-and-white photo of prairie research area, 1 text-figure (chart). Original stiff printed wrappers, lettered in green on the front cover, 8vo. Occasional Papers, Number 8, Minnesota Museum of Natural History, The University of Minnesota. Name stamp of ornithologist William H. Behle on the front wrapper. No other ownership stocks. Rear wrapper has a faint corner crease; a tight and clean copy in near fine condition.
1961, "Natural History", Occasional Papers: Number 8, Minnesota Museum of Natural History, The University of Minnesota Press, 51 p., very good paper.