Galápagos
1967
Laruelle, J. |
Ecosystem surveys
Systems analysis of mediterranean desert ecosystems of northern Egypt, Samdene
1978
Ayyad, Mohamed A. |
Els pasturatges : funcionalisme i aprofitament dels ecosistemes pastorals
1984
Fillat, Frederic |
Garcia-Ruiz, José M. |
Montserrat, Pere |
Vilar, Lluis |
Agroecosystem analysis and development for the northern areas of Pakistan
1985
Conway, Gordon R. |
Alam, Zahur |
Husain, Tariq |
Mian, M. Alim |
Conservacion y ecodesarrollo
1978
Bonelly de Calventi, Idelisa |
Structure and function of tundra ecosystems
1975
Rosswall, T. (Thomas) |
Heal, O. W. |
Fauna of Sundbarban mangrove ecosystem, west Bengal, India
1989
Mandal, A. K. |
Nandi, N. C. |
Prospects for New Zealand biosphere reserves
1979
Robertson, B. T. |
O'Connor, K. F. |
Molloy, B. P. J. |
Black Mountain reserve : preliminary development and management plan
1974
Elliott, M. A. |
Douglas, J. S. |
Reserva nacional de la Macarena
1968
Olivares, Antonio |
Mozo Morron, Teobaldo |
Mozo Morrón, Teobaldo |