This study presents a citation analysis of 20 doctoral dissertations in the subject field of Latin which is part of the broader field of classical philology. The dissertations were all written at Swedish universities and were published during two measurement periods between 1979-2017. The aim of the study is to provide a basis for decision-making for librarians who are responsible for collections of books and journals on classical philology at Swedish university libraries. The study takes as its starting point and theoretical background a citation analysis made by Gregory A. Crawford and published in an article in 2013. That citation analysis was made with a philological journal as empirical object and found a remarkable stability over time in citation practices by scholars involved in classical philology especially regarding the language, age and type of material cited. With Crawfords results as background this present study finds similar patterns of stability in citation practices in the Swedish dissertations analysed. The conclusion of this study is that Swedish university libraries should retain their older books on classical philology as well as continue to develop their collections with books as well as journals written in the English, German, French, and Italian languages. This is a two years master´s thesis in Library and Information Science.