(1980). Case studies on desertification (Natural Resources Research XVIII). Unesco/UNEP/UNDP.
Lua i Stíl Chicago (17ú heag.)Case Studies on Desertification (Natural Resources Research XVIII). Paris: Unesco/UNEP/UNDP, 1980.
Lua MLA (9ú heag.)Case Studies on Desertification (Natural Resources Research XVIII). Unesco/UNEP/UNDP, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.