'Hydrotransport 4 was sponsored and organised by BHRA Fluid Engineering, U.K., in conjunction with the Alberta Research Council, Canada and was held at Banff, Alberta, Canada from May 18th-21st, 1976' - p.iii.
Proceedings of Hydrotransport 4, 1976 : 4th International Conference on th Hydraulic Transport of Solids in Pipes. ISBN 0900983566. Published by BHRA Fluid Engineering in 1977. Publication and catalogue information, links to buy online and reader comments.