Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
Hogan, William. Safe scuba / by William "Bill" Hogan. - 3rd ed.. - [Palos Verdes, Calif.] : National Association of Skin Diving Schools, 1973, c 1971. 112 p. : ill. (part col.) ; 29 cm. * Scuba apparatus.