El Secreto del Grupier" Divulgado por Mac Harrisson, (Ing.o). Metodo para obtener UN BENEFICIO DIARIO DE 35 PESETAS con solo el empleo de 162. Precio: 5 pesetas by Harrisson, Mac - 1950

Barcelona: Imprenta El Sport, 1950. Pamphlet. 16p., pamphlet in 5.5x3.5 inch stapled wraps decorated with a vignette picture of a roulette wheel; staple is rusted with a touch of migration, p.2 has a lower-margin smudge with a rust-mark (or foxing), an otherwise very good copy. Back cover shows a stylized feline killing an ape; caption reads, "El calculo vence al azar como el tigre al mono," or roughly, This formula leaps on chance like a tiger on a monkey.