Principles of Tzeltal Plant Classification: An Introduction to the Botanical Ethnography of a Mayan-Speaking People of Highland Chiapas. PETER H. RAVEN, DENNIS E. BREEDLOVE, Peter G. Rivière, B. Berlin • 1975
General Principles of Classification and Nomenclature in Folk Biology PETER H. RAVEN, DENNIS E. BREEDLOVE, B. Berlin • 1973