concept

A text-book on trade waste waters : their nature and disposal / by H. Maclean Wilson and H.T. Calvert.

Principles of sewage treatment / by Dr. Dunbar ; translated with the author's sanction, by H.T. Calvert.

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Calvert, H. T. (Harry Thornton), 1878-

Works from the collections

A text-book on trade waste waters : their nature and disposal / by H. Maclean Wilson and H.T. Calvert.

Principles of sewage treatment / by Dr. Dunbar ; translated with the author's sanction, by H.T. Calvert.