A set S of k points in a projective plane of order q is of type (m, n) if e
ach line meets S in either m or n points. The parameters are standard if q=
a(2) for a=n-m. In this note we give a method for determining all admissibl
e nonstandard parameters for a given m and q a prime power. (C) 1999 Academ
ic Press.