J Austral Math Soc Ser A 57 pp103--112, 1994.
(Received 15 July 1993)
Regular maps of type {p, q}r and the associated groups Gp,q,r are considered for small values of p, q and r. In particular, it is shown that the groups G4,6,6 and G5,5,6 are Abelian-by-finite, and there are infinitely many regular maps of each of the types {4, 6}6, {5, 5}6, {5, 6}6 and {6, 6}6.
1991 AMS Subject Classification: primary 05C25; secondary 20F05, 57M15
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