001: 80749
003: Starlibrary PMS 4.5
005: 20180430
020: ^a0-582-55044-0
066: ^aJa.E
072: ^aINTERLANGUAGE
082: ^a401.93
100: ^aJack C. Richards
240: ^aError Analysis: perspectives on second language acquisition
245: ^a ^b perspectives on second language acquisition
260: ^c1974
650: ^aSOCIAL FACTORS
650: ^aINTERLANGUAGE AND LANGUAGE LEARNERS
650: ^aTHE STUDY OF LEARNER ENGLISH