Gupta, Om Prakash, 1933- Modern weed management : with special reference to agriculture in the tropics and subtropics / O. P. Gupta. - 4th ed. - Jodhpur : Agrobios, India, 2011. - 615 p. : ill. ; 25 cm. Fakulti Industri Asas Tani. ISBN: 9788177544251 Subjects--Topical Terms: Weeds--Control--Tropics.