Available free online are back issues of Canadian Catholic Historical Association Journals from 1933 to 2006, as well as indices for issues from 1933 through 1983:
- Back Issues. CCHA Journals, 1933-2006
- Bilingual Index to CCHA Transactions (1933-1958)
- Index to the CCHA Report (1959-1965) and Study Sessions (1966-1983)
- Index des Mémoires (1959-1965) et des Sessions d'études (1966-1983)
There are academic articles with a narrow scope of interest, but some such as The Irish Emigration of 1847 and Its Canadian Consequences and The Hon. Edward Whelan: A Father of Confederation from Prince Edward Island – One of Ireland’s Gifts to Canada may contain useful background reading.