TY - BOOK ED - Great Britain. TI - Towards clearer water: Rivers Pollution Survey of Scotland SN - 0114907803 (sd) PY - 1972/// CY - Edinburgh PB - H.M.S.O. KW - Water KW - Pollution KW - Scotland N1 - Book (ix,37p.) and 3 fold. leaves (col. maps) in plastic envelope ER -