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1.- ESTIMATING TRAIL-RELATED SOIL EROSION IN THE HUMID TROPICS; JATUN SACHA, ECUADOR, AND LA SELVA, COSTA RICA ROYAL SWEDISH ACADEMY OF SCIENCES; STOCKHOLM; SWE; SWEDEN, 1996 Ver registro
2.- SOIL POLLEN AND LAND USE HISTORY IN THE LOWLANDS TROPICS; PRELIMINARY DATA ASSOCIATION OF AMERICAN GEOGRAPHERS, SOUTHEASTERN DIVISION; WASHINGTON, DC; USA; UNITED STATES, 1995 ASSOCIATION OF AMERICAN GEOGRAPHERS 91ST ANNUAL MEETING; ABSTRACTS Ver registro
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