YELLAMANDA REDDY, T. Sankara Reddi, G.H. Principles of agronomy / [by] T.Yellamanda Reddy, G.H.Sankara Reddi - 2nd ed., rev. - Ludhiana Kalyani pub. 1999 - xvi, 515 pages Includes index. ISBN: 8176630527 Subjects--Topical Terms: Agriculture Dewey Class. No.: 630 / YEL