The scientific basis for shipibo soil classification and land use :
Behrena, Clifford A.
The scientific basis for shipibo soil classification and land use : Changes in soil-plant associations with cash cropping. - Washington, DC : American Anthropological Association, 1989. - p. 83-100 : il - trimestral - Vol.91, no.1(Mar.1989) - American Anthropologist ; vol.91, no.1 . - Estados Unidos. American Anthropological Association. .
The scientific basis for shipibo soil classification and land use : Changes in soil-plant associations with cash cropping. - Washington, DC : American Anthropological Association, 1989. - p. 83-100 : il - trimestral - Vol.91, no.1(Mar.1989) - American Anthropologist ; vol.91, no.1 . - Estados Unidos. American Anthropological Association. .