Brooks, Stanley N., 1922- Hop production / [by S.N. Brooks, C.E. Horner, and S.T. Likens. - Washington] : Agricultural Research Service, U.S. Dept. of Agriculture, [1961] - 46 p. : ill., map ; 24 cm. - Agriculture information bulletin ; no. 240 . LCCN: agr62000006 Subjects--Topical Terms: Hops. LC Class. No.: S21 / .A74 no. 240