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Do you think you might have HPPD?
Take this survey out of University of East London,
which attempts to understand the inner experiences of
people with lasting perceptual changes from use of
psychoactive drugs, (diagnosed or not). It investigates
factors that could create distress or effect quality of life.
cover image
Flower of Joy
Rating :
rating
Author(s) :
Hendrik de Leeuw
Pages :
241
Pub Date :
1944
Edition(s) at Erowid :
1944(hb,1st ed,vg/g)
Publisher :
Willey Book Company
ISBN :
None