Description of the ecoregions of the United States / comp. Robert G. Baile. - [Washington, D.C.] : Forest Service, 1980
. - IV, 77 p. : il. ; 23 cm. - (Miscellaneous publication) ; 1391
ARQ-8381
. - IV, 77 p. : il. ; 23 cm. - (Miscellaneous publication) ; 1391
ARQ-8381