Proceedings of the 23rd Industrial Waste Conference, May 7, 8 and 9, 1968
- 2 volúmenes (1178 páginas) : ilustraciones
- Engineering extension series ; no. 132 Engineering bulletin of Purdue University .
"The Purdue Industrial Waste Conference is under the direction of: the School of Civil Engineering, the Division of Conferences and Continuation Services, in cooperation with the Indiana State Board of Health [y otros]"