Drydock extension : a 1980 underwater technology survey for extension of time between drydocking / by F. Matanzo ... [et al.] - Washington, D.C. : U.S. Department of Transportation, 1980 - Various pagings ; 28 cm. Final report-December,1980 Subjects--Topical Terms: Ocean engineeringUnderwater exploration Dewey Class. No.: 551.46021