Haska, Tadeusz Leon, 1919-, An investigation of the acquisition process of second language competence as reflected in second language performance/ by Tadeusz Leon Haska. - Ann Arbor, Mich. : University Microfilms International, 1977. - 1 microfilm reel : positive ; 35 mm. Thesis (Ph.D.) - University of California, 1976 Subjects--Topical Terms: Language acquisition.