1. 1. B. A. Anderson, R. C. Read, and C. C. Cadogan, 1977 . Howell designs from Room squares. Proc. Second Caribbean Conference in Combinatorics and Computing , U.W.I., Cave Hill, Barbados. pp.55 -62 .
2. 2. B. A. AndersonHowell designs of type (H(p - 1, p + 1). To appear.
3. On Howell designs