[Second printing, with corrections and addenda] - Original booklet from 1963 in nice condition.  Contains a complete bibliography of information on psilocybin and hallucongenic mushrooms compiled by R. Gordon Wasson, author of "Soma: Divine Mushroom of Immortality," a major contribution to the research of hallucinogenic mushrooms, psilocybin, LSD, and psychedelic drugs.   The booklet is in unread condition.  There is some minor toning along the edge.  The staples have some staining on the back.  See photos.  Only a limited number of these were printed.  Measures 6" x 9"