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Robert Clarke
Robert C. Clarke is Cannabis researcher and Projects Manager for the International Hemp Association in Amsterdam and the author of Marijuana Botany and Hashish!
Mark D. Merlin is Botany Professor ...view moreRobert C. Clarke is Cannabis researcher and Projects Manager for the International Hemp Association in Amsterdam and the author of Marijuana Botany and Hashish!
Mark D. Merlin is Botany Professor at University of Hawai’i at Manoa and author of On the Trail of the Ancient Opium Poppy.view less
Books by Robert Clarke
Cannabis: Evolution and Ethnobotany Project Heller Rating: 0 out of 5 stars0 ratingsFear inThe night Rating: 0 out of 5 stars0 ratings