Harlan, Jack R. Theory and dynamics of grassland agriculture / Jack R. Harlan. - New York : D. Van Nostrand, c1956. - 281 pages : Illustrations ; 24 cm. - The Grassland farm series . - The Grassland farm series. . Includes bibliography. Nat. Bib. No.: GB56-16918 Subjects--Topical Terms: Forage plants.Pastures. LC Class. No.: SB199 / .H25 Dewey Class. No.: 633.2