Leopold, Aldo 1886-1948 A Sand County almanac and Sketches here and there / by Aldo Leopold ; illustrated by Charles W. Schwartz - Oxford : Oxford University Press, 1968 - xxviii, 228 p. : il. ; 21 cm. Subjects--Topical Terms: Historia natural--Inglés--Conservación de especimenes LC Class. No.: QH81 / L46 1968