River, ecology and man : proceedings
RAY, T. Ogleshy
River, ecology and man : proceedings - New York 1972 - 465p
RIVERS -- CONGRESSES
ECOLOGY -- CONGRESSES RIVERS -- CONGRESSES WATER -- CONGRESSES
551.483 I-5R
River, ecology and man : proceedings - New York 1972 - 465p
RIVERS -- CONGRESSES
ECOLOGY -- CONGRESSES RIVERS -- CONGRESSES WATER -- CONGRESSES
551.483 I-5R