Gradman, H.L. and Spolsky, B.1975. Reduced redundancy testing: a progress report. Testing language proficiency, ed. by R.L. Jones and B. Spolsky, 59-70. Arlington, Virginia : Center for Applied Linguistics.
2.
Guiora, A.A.; Paluszny, M.; Beit-Hallahmi, Benjamin; Catford, J.C.; Cooley, Ralph E. and Dull, Cecilia Y.1975. Language and person studies in language behavior. Language Learning25. 43-62.
3.
Oller, J.W., Jr. 1976. A program for language testing research. Papers in second language acquisition. Language Learning Special Issue 4. 141-165.
4.
Selinker, Larry.1972. Interlanguage. IRAL (International Review of Applied Linguistics in Language Teaching)10:3. 209-232.
5.
Spolsky, B.1975. The problem of validation. Papers on language testing: 1967-1974, ed. by L. Palmer and B. Spolsky, 146-153. Washington, D.C.: TESOL.