Registros relacionados: 1993 directory of country environmental studies:
- IUCN directory of South Asian protected areas /
- World directory of country environmental studies
- Directory of Wetlands of International Importance in the Western Palearctic /
- Directory of environmental information e organizations in Southern Africa
- Online database search services directory : a reference and referral guide to libraries, information firms, and other sources providing computerized information retrieval and associated services using publicy available online detabases /
- Online database search services directory : a reference and referral guide to libraries, information firms, and other sources providing computerized information retrieval and associated services using publicy available online detabases /