Isom, B. G. (1986). Rationale for sampling and interpretation of ecological data in the assessment of freshwater ecosystems. American Society for Testing and Materials.

Isom, B. G. Rationale for Sampling and Interpretation of Ecological Data in the Assessment of Freshwater Ecosystems. Philadelphia, PA: American Society for Testing and Materials, 1986.

Isom, B. G. Rationale for Sampling and Interpretation of Ecological Data in the Assessment of Freshwater Ecosystems. American Society for Testing and Materials, 1986.