The elementary constructive methods for BBD's and GYD's which have been used in optimality considerations for a number of years, are listed and illustrated. These are not detailed algebraic or geometric prescriptions for listing each entry, but rather methods for combining LS's and known BIBD's to yield the desired products. Nevertheless, there results a large class of useful and previously unpublished designs.
Ann. Statist.
3(1):
109-118
(January, 1975).
DOI: 10.1214/aos/1176343002