Usinger, Robert L.
The life of rivers and streams / Robert L. Usinger. - New York : McGraw-Hill in cooperation with The World Book Encyclopedia, c1967. - 232 p. : chiefly col. ill. ; 26 cm. - Our living world of nature .
Includes index.
0070666903
Aquatic ecology.
Aquatic insects.
Marine ecology.
Marine insects.
Entomology.
The life of rivers and streams / Robert L. Usinger. - New York : McGraw-Hill in cooperation with The World Book Encyclopedia, c1967. - 232 p. : chiefly col. ill. ; 26 cm. - Our living world of nature .
Includes index.
0070666903
Aquatic ecology.
Aquatic insects.
Marine ecology.
Marine insects.
Entomology.