This selected bibliography on language learners' systems and error analysis is divided into five section. Section 1 deals with the notion of approximative or intermediate systems and interlanguage, and with more classical studies on contrastive analysis. Section 2 focuses on the concept and definition of learner errors and includes items dealing with their elicitation and classification. Section 3 lists some of the most important items in the fields of first language acquisition and the use of the first language by children and groups speaking nonstandard dialects. Studies on language contact are the focus in Section 4. The final part, Section 5, contains references to works dealing with second language learning with particular reference to error analysis or learners' systems. (Author/AM)