Symposium on Biological Methods for the Assessment of Water Quality, Los Angeles, American Society for Testing and Materials. Committee D-19 on Water, Cairns, J., & Dickson, K. L. (1973). Biological methods for the assessment of water quality: A symposium presented at the seventy-fifth annual meeting, American Society for Testing and Materials. American Society for Testing and Materials.

Symposium on Biological Methods for the Assessment of Water Quality, Los Angeles, American Society for Testing and Materials. Committee D-19 on Water, John Cairns, agus Kenneth L. Dickson. Biological Methods for the Assessment of Water Quality: A Symposium Presented at the Seventy-fifth Annual Meeting, American Society for Testing and Materials. Philadelphia: American Society for Testing and Materials, 1973.

Symposium on Biological Methods for the Assessment of Water Quality, Los Angeles, et al. Biological Methods for the Assessment of Water Quality: A Symposium Presented at the Seventy-fifth Annual Meeting, American Society for Testing and Materials. American Society for Testing and Materials, 1973.