Los espacios naturales protegibles su conservación, regulación legal e incidencia en la ordenación del territorio
1990
Paluzie i Mir, Lluís |
Conservation administrations
National parks and wildlife service : annual report
1988
Bridle, Gary, ed. |
A field guide to the national parks of New South Wales
1978
Fairley, Alan |
A manual of wildlife conservation
1971
Teague, Richard D. |