A new method to obtain the Picard-Fuchs equations of effective, N = 2
supersymmetric gauge theories with massive matter hypermultiplets in t
he fundamental representation is presented. It generalises a previousl
y described method to derive the Picard-Fuchs equations of both pure s
uper Yang-Mills and supersymmetric gauge theories with massless matter
hypermultiplets. The techniques developed are well suited to symbolic
computer calculations. (C) 1997 Elsevier Science B.V.