en el umbral de un nuevo universo Dubin, Alvin H. creator Purcalla Muñoz, José joint author. text sp Barcelona Editorial Occitania [1968] 1968 monographic spa 220 p. illus. [por] Alvin H. Dubin y José Purcalla Muñoz. Hallucinogenic durgs Case studies Hippies 940205 20160527195628.0 150128