Gupta, Om Prakash, 1933- Modern weed science in the tropics and sub-tropics / by O.P. Gupta and P.S. Lamba. - 1st ed. - New Delhi : Today and Tomorrow's Printers & Publishers, c1978. - viii, 421 p. : ill. ; 25 cm. Includes bibliographical references and index. LCCN: Subjects--Topical Terms: Weeds--Control.Weeds.Weeds--Control--Tropics.Weeds--Tropics. LC Class. No.: SB611 / .G86 1978 Dewey Class. No.: 632/.58