Bettsworth, Michael. Drownproofing : : a technique for water survival / [electronic resource] / Michael Bettsworth.. — New York : : Schocken Books,, 1977, c1976.. — 55 p. : : ill. ; 13 x 22 cm. ISBN: 0805236465 : $5.95. 9780805236460 0805205586 (pbk.) : $2.95 9780805205589 (pbk.) LCCN: 76048762 Subjects--Topical Terms: Drowning--Prevention.Swimming.Noyade--PrĂ©vention.Natation. LC Class. No.: GV837 / .B46 1977 Dewey Class. No.: 797.2/1