ラルフ・メツナー
Metzner, Ralph (2013). The Toad and the Jaguar: A Field Report of Underground Research on a Visionary Medicine: Bufo Alvarius And 5-Methoxy-dimethyltryptamine (paperback ed.). Berkeley, CA: Green Earth Foundation & Regent Press. ISBN 978-1587902543
Metzner, Ralph (2010). Birth of a Psychedelic Culture: Conversations about Leary, the Harvard Experiments, Millbrook and the Sixties (paperback ed.). Santa Fe, NM: Synergetic Press. ISBN 978-0-907791-38-6
Metzner, Ralph (2009). Mind Space Time Stream (paperback ed.). Berkeley, CA: Green Earth Foundation & Regent Press. ISBN 978-1-58790-172-0