Forum pro conservacion del Lago de Valencia 3 al 13 de octubre de 1963
1966
Böckh, Alberto |
Britto, Clemente |
Protected areas
Oak Hammock marsh : conservation centre feasibility assessment
1989
Gordon, Woods |
Our national parks in color
1965
Butcher, Devereux |
Which islands merit World Heritage status ?
Thorsell, J. W. |
Nuevos parques nacionales Colombia
1990
Sanchez Paez, Heliodoro |
Hernández Camacho, Jorge |
Rodriguez Mahecha, Jose Vicente |
Castaño U., Carlos |
Tahoe : an environmental history
1984
Strong, Douglas H. |
Colombia Parques Nacionales
1986
Mutis, Jose Celestino |
Parks, politics, and the people
1980
Wirth, Conrad Louis |
Federal research natural areas in Oregon and Washington : a guidebook for scientists and educators
1972
Franklin, Jerry F. |
Hall, Frederick C. |
Dyrness, C. T. |
Maser, Chris |