Miller, A. P. (1931). Proceedings of the Fourth Annual Conference Maryland Water and Sewerage Association, Hagerstown, Maryland, May 13 and 14, 1930.
Παραπομπή Chicago StyleMiller, Arthur P. Proceedings of the Fourth Annual Conference Maryland Water and Sewerage Association, Hagerstown, Maryland, May 13 and 14, 1930. 1931.
Παραπομπή MLAMiller, Arthur P. Proceedings of the Fourth Annual Conference Maryland Water and Sewerage Association, Hagerstown, Maryland, May 13 and 14, 1930. 1931.
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