[Committee hearings] serial, 92d Congress. 12. Port and harbor Safety, hearings before Subcommittee on Coast Guard. Coast and Geodetic Survey, and Navigation, 92d Congress, 1st Session, on H,R, 867 H.R. 3635, H.R. 8140 [and] H.R. 6232, July 20-Aug. 23, 1971.

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