TY - BOOK AU - Nilsson,Harold D. TI - Multiple longshore sand bars: environments of deposition and a model for their generation and maintenance PY - 1979/// CY - Ann Arbor, Mich. PB - University Microfilms International KW - Sedimentation and deposition KW - Environmental aspects KW - Marine sediments N1 - Thesis (Ph.D.)-University of Massachusetts, 1979 ER -