Books by Robert Connell Clarke
Cannabis botany, breeding, evolution, and ethnobotany. Cannabis: Evolution and Ethnobotany is coauthored with Mark Merlin.
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Marijuana Botany: An Advanced Study: The Propagation and Breeding of Distinctive Cannabis
Paperback · 1981 · ISBN 9780914171782 -
Cannabis: Evolution and Ethnobotany
Paperback · 2016 · ISBN 9780520292482