Progress in ecology
Today and Tomorrow's Printers & Publishers
edited by S.K. Chadha
Today & Tommorow's Printers & Publishers 1987 Progress in ecology v. 9
India , U.S.
Available at 3 libraries
by Purshotam Kaushik
Today and Tomorrow's Printers & Publishers 1983 Progress in ecology v. 8
P.S. Yadava and J.S. Singh
Today and Tomorrow's Printers & Publishers 1977 Progress in ecology v. 2
Available at 1 libraries