In 1937, Ivan Mladineo prepared a book, Narodni Adresar (National Directory of Croat, Slovene, and Serb Organizations), listing the officers of the fraternal organizations, mutual benefit and political federations, newspapers, almanacs, religious organizations, sport organizations, veterans organizations, and welfare organizations extant at that time. It was a snapshot of the times and the individuals who were officers of those organizations in 1937. This is an excellent early listing of all Yugoslavs in the U.S. and Canada. Included are the four principal officers of each group: President, Vice-President, Secretary, and Treasurer. Groups are listed by State, City, and fraternal organization. Also, there is an every name index of all individuals. An excellent resource.