Safe scuba / [electronic resource] by William "Bill" Hogan.
Material type: TextPublication details: [Palos Verdes, Calif.] : National Association of Skin Diving Schools, 1973, c 1971.Edition: 3rd edDescription: 112 p. : ill. (part col.) ; 29 cmSubject(s): Online resources:No physical items for this record
Bibliography: p. 111.
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