Thurston, Robert Venable Informational feedback in agricultural development programs : a thesis Tennessee University / Robert Venable Thurston - Springfield : NTIS , 1972 - vii, 108p. : ill. ; 30 cm. - Photocopy of USAID Mf. No. PB-224 . Includes bibliographical references. Subjects--Topical Terms: Agricultural developmentTheses Gov. Doc. Class. No.: Th 630.89 THO