TY - BOOK AU - Barnes,R S K. AU - Sankarakarya,. AU - Hughes,R N . TI - An introduction to marine ecology / SN - 8120801350 U1 - 577.7 PY - 1988/// rep.1989 & 1990 CY - London : PB - Oxford , KW - MARINE ECOLOGY N1 - Includes bibliography & index ER -