Aquatic weeds: their menace and control : a text book and manual /

by Gupta, O. P.
Published 1979

Aquatic weed control for efficient water use /

by Gupta, O. P.
Published 1973

Modern weed science: in the tropics and sub-tropics /

by Gupta, O. P.
Published 1978

Finite and boundary element methods in engineering /

by Gupta, O. P.
Published 1999

Fundamentals of weed science : a text book /

by Gupta, O.P.
Published 2007

Dictionary of commerce /

Published 1992