in "Combinatorics", edited by M. Hall, Jr. and J. H. van Lint.
Published by Mathematical Centre, Amsterdam, and Reidel Publishing Co., Dordrecht, Holland,
1975, pp. 115-142.
Cover, pages 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142.
