A proposed biological measure of stream conditions
Subtitle: based on a survey of the Conestoga Basin, Lancaster County, Pennsylvania
Published: 1949
Place of publication: Philadelphia?
Language: eng
Number of pages: 341
Subjects: Water; Pollution; Limnology; Rivers
Notes: Extracted from Proceedings of the Academy of Natural Sciences of Philadelphia, vol. CI, 1949.

Bibliography: p. 295.