R. Gordon Wasson
Peter Lamborn Wilson
Narayan Bhavanrao Pavgee
D. N. Ovsi︠a︡niko-Kulikovskiĭ
Robert Gordon Wasson
Jan E. M. Houben
National Drug Intelligence Center (U.S.)
Biśvanātha Mukhopādhyāẏa
Daniel Henry Holmes Ingalls
Mott T. Greene
Unknown Author
J. A. B. van Buitenen
Schneider, Ulrich
Caland, W.
E. Esa Rāmanāthan
S. Kalyanaraman
Philipp Paulitschke
Chintaman Ganesh Kashikar
Robert Horton Gundry