Robert, George Lamar Economic returns to investment in control of Mimosa Pigra in Thailand [microform] / George Lamar Robert - Ann Arbor, Mich. : University Microfilms International, 1984 - 2 microfiches ; 11 x 15 cm. Thesis (Ph.D.)-University of Maryland, 1982 ISBN: Y910040612 Subjects--Topical Terms: Mimosa pigra--Economic aspects