This handbook, written by D.B. Blewett, Ph.D., and N. Chwelos, M.D., in 1959, was one of the earliest manuals written for LSD-assisted therapy. It is still one of the most comprehensive guides on psychedelic therapy, offering a wealth of details on dosage, setting, the stages of the LSD experience, and common issues that may arise.

Full text available online.

Handbook for the Therapeutic Use of LSD: Individual and Group Procedures (1959)