1. Technologies for sustainable agriculture in the tropics: proceedings of two international symposia sponsored by Division A-6 of the American Society of Agronomy in San Antonio, TX, and Denver, CO, 1990 and 1991, respectively
Author: editors, John Ragland and Rattan Lal; organizing committee, John Ragland )0991(, Augustine Uzo Mokwunye )1991(; editorial committee, Kenneth Cassman...]et al.[; editor-in-chief]s[ Gary A. Peterson, P.S. Baenziger, Robert J. Luxmoore
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Tropics - Congresses ، Sustainable agriculture,Developing countries - Congresses ، Sustainable agriculture
Classification :
S
481
.
T43
1993
2. The harsh lands; a study in agricultural development
Author:
Library: Library of Faculty of Geography of Tehran University (Tehran)
Subject: Agriculture -- Developing countries,Agriculture -- Tropics
Classification :
S439
.
G79
