1
2
Publicado 1993
“...World Congress on National Parks and Protected Areas...”
Procedimiento de la Conferencia
Libro
3
Publicado 1993
“...World Congress on National Parks and Protected Areas...”
Libro
4
Publicado 1992
“...World Congress on National Parks and Protected Areas, IV th....”
Libro
5
Publicado 1992
“...World Congress on National Parks and Protected Areas, 14th...”
Libro
6
Publicado 1994
“...World Congress on National Parks and Protected Areas, IVth Caracas Venezuela...”
Libro
7
Publicado 1993
“...World Congress on National Parks and Protected Areas, IV th., 1992...”
Libro