This project provides descriptions of some points of contrast between Serbo-Croatian and English in the fields of phonology, grammar, and lexicon. The project concentrated particularly on the points showing difficulties for the English-speaking learner of Serbo-Croatian, thus forming the basis for development of teaching materials and guides for classroom procedure. The approach used was a contrastive analysis of the two language, combined with an error analysis of both written and spoken production of English-speakers learning Serbo-Croatian. The project was based on materials already collated from an earlier project on the same subject. In order to check the conclusions made from an error analysis of the earlier material, and to gather more material, a specially designed course in Serbo-Croatian was given to intermediate-level native English-speaking students. In addition, students who had studied in Zagreb were used as test subjects, providing further sources of interference analysis. Copies of the tests and summaries of the error analysis conclusions are provided. (Author/LG)