The article shows, on the example of Croatian newspapers in Australia and New Zealand, the possibilities of researching the publications of Croatian emigrants. The goal of the Croatian Emigrant Press project implemented at the Faculty of Humanities and Social Sciences, University of Zagreb, is explained. The method of creating bibliographies within the project (with views in ISBD and MARC 21 formats) is also explained, as is the research methodology, which includes searching library catalogues, community engagement (crowdsourcing) and searching archival materials. The role of archives as heritage institutions that are indispensable in the research of publications is especially explained. Examples are given of New Zealand and Australian newspapers for which the only surviving sources are archival ones. One New Zealand newspaper (Glas istine, The Voice of Truth) has not been preserved in any of its copies, but documents preserved in the New Zealand archives prove that they were published. A similar example is of an Australian newspaper (Svijetlo, The Light) for which a document was found which makes it clear that the person who wrote the document had the publication in his hands. Images of documents related to the research of Croatian newspapers are also presented in the paper. One of these documents is related to the implementation of censorship in Australia in the 1930s and indicates that it were the Croatian newspapers Iskra (The Sparkle) and Oganj (The Flame) that influenced the amendments to regulations in order to control press as effectively as possible. The importance of private archives and community archives within Croatian associations is pointed out, and new possibilities for researching Croatian publications in archives in countries where emigrated Croats live are also emphasized.