This article addresses the need for quantitative investigation into students' use of information resources in historical research. It reports the results of a citation analysis of more than 3,000 citations from master's level history theses submitted between 1998 and 2008 at a mid-sized public university. The study's results support the hypotheses that the predominant format in history research is the monograph and that history research entails use of older resources, and in greater proportions, than other disciplines. Results also support the conclusions that journal usage is comparatively low and that there is a high degree of citation dispersal across journal titles. (Contains 1 figure, 6 tables and 31 notes.)