Antonie, R. L., & Koehler, F. J. (1971). Application of rotating disc process to municipal wastewater treatment: Authors: Ronald L. Antonie and Franklin J. Koehler. Washington: U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off..

Antonie, Ronald L., andfavorite Franklin J. Koehler. Application of Rotating Disc Process to Municipal Wastewater Treatment: Authors: Ronald L. Antonie and Franklin J. Koehler. Washington: U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971.

Antonie, Ronald L., andfavorite Franklin J. Koehler. Application of Rotating Disc Process to Municipal Wastewater Treatment: Authors: Ronald L. Antonie and Franklin J. Koehler. Washington: U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971.