historyofbdsm: Discipline Helmets: Number One (May 1978). Centurian, First printing, 1978, paperback
historyofbdsm: Discipline Helmets: Number One (May 1978). Centurian, First printing, 1978, paperback, quarto, 47pp., illustrated in color and b&w. - See more at: http://www.calibanbooks.com/pages/books/C000025338/n-a/discipline-helmets-number-one-may-1978#sthash.ZF2RQHIR.dpuf -- source link