Krul, W. F. J. M. (1964). Selected topics in sanitary engineering. Uitgeverij Waltman.
Chicago Style (17th ed.) CitationKrul, Wilhelmus Franciscus Johannes Marie. Selected Topics in Sanitary Engineering. Delft: Uitgeverij Waltman, 1964.
MLA (8th ed.) CitationKrul, Wilhelmus Franciscus Johannes Marie. Selected Topics in Sanitary Engineering. Uitgeverij Waltman, 1964.
Warning: These citations may not always be 100% accurate.