This unannotated bibliography consists of four sections. Section One is a general introduction to error analysis and interlanguage studies, aimed primarily at students writing their theses and at practicing teachers with little experience in these fields. Section Two presents a list of the journals referred to in the bibliography. Section Three, the bibliography proper, includes some 800 items on error analysis and interlanguage studies, covering the period from 1970 to 1979 (including also a few "classical" papers from the late 1960s). The two most important criteria for inclusion are that items have been published and that they are in English. Books and articles on contrastive analysis are included only if they deal with either or both of the two linguistic fields in question. Review articles are included. Bibliographical items are not categorized but are arranged alphabetically according to author, chronologically for each author. Section Four presents a list of other bibliographies in the field, arranged chronologically. (Author/JB)