Marijuana Botany: An Advanced Study: The Propagation and Breeding of Distinctive Cannabis
Robert Clarkes splendid effort will be widely appreciated.  HisMarijuana Botanywill be constantly consulted by a wide variety of  researchers in the years to come. (Richard Evans Schultes-Director,  Harvard Botanical Museum)This work is a compact guide for interested scientists and  breeders. --Carlton E. Turner, Ph.D.-Director, National Institute of  Mental Health Marijuana Research Project