Autumn Hawk Flights:

New Brunswick, N.J.: Rutgers University Press, 1975. First edition (presumed; no earlier dates stated). Quarto in sky blue DJ; xxxii, 398 p b&w illus. 25 cm. DJ slightly worn, front-top corner bumbed, mild spotting to top and side fore edge, otherwise in great condition. Pages are very clean and bright; tight binding. Near Fine(-) in Very Good DJ. Hardcover. ISBN: 0813507774

Fascintaing in-depth study of hawk migration and flight. Birds of Prey. Raptors. Hawks -- Migration -- North America.