A new method of deriving designs of type O:PP is described. The method gives rise to some designs previously obtained by other methods, and also to some entirely new designs. These new designs are described in detail and a worked example given.
"Some Further Designs of Type O:PP." Ann. Math. Statist. 32 (4) 1186 - 1190, December, 1961. https://doi.org/10.1214/aoms/1177704858