Osburn, RobertRobertOsburn2016-09-162016-09-162007 Sprin2007-12Ramanujan Journalhttp://hdl.handle.net/10197/7948We extend a result of Ahlgren and Ono [1] on congruences for traces of singular moduli of level 1 to traces defined in terms of Hauptmodul associated to certain groups of genus 0 of higher levels.enThe final publication is available at Springer via http://dx.doi.org/10.1007/s11139-007-9050-8.Singular moduliModular formsCongruencesJournal Article14341141910.1007/s11139-007-9050-82016-08-10https://creativecommons.org/licenses/by-nc-nd/3.0/ie/