| 1. | Título: Conference of european statisticians : the environment in Europe and North-America : annotated statistics 1992 Pri. Menção: ONU-United Nations, United Nations Statistical Commission, Economic Commission for Europe Data Edição: 1992 COTA(S): ESTONU8397 |  | |
| 2. | Título: World resources : a guide to the global environment Pri. Menção: World Resources Institute ; colab. The United Nations Environment Programme and The United Nations Development Programme Data Edição: 1992-1994 COTA(S): ESTUS14638 |  | |