> Verlagsreihe
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17:
Guidelines for soil survey and land evaluation in ecological research R. F. Breimer; A. J. van Kekem; H. van Reuler
Paris: UNESCO Pr., 1975-
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3:
Human Population Problems in the biosphere Some research strategies and designs P. Baker [Hrsg.]. Unesco
Paris: UNESCO Pr., 1975-
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2:
Mediterranean forests and maquis ecology, conservation and management Unesco
Paris: UNESCO Pr., 1975-