Ford, Clarence T.Developments in Written Composition During the Primary School Period. British Journal of Educational Psychology, 1954, 24, 38-45.
2.
Gates, Arthur I.The Gates Advanced Primary Reading Test. New York: Bureau of Publications, Teachers College, Columbia University, 1961.
3.
Hollingshead, August B.Two Factor Index of Social Position. New Haven: 1965 Yale Station, 1957.
4.
Lindquist, E. F. and A. N. Hieronymus.Iowa Tests of Basic Skills, Form 2. Boston: Houghton Mifflin Company, 1956.
5.
Loban, Walter.The Language of Elementary School Children. Research Report No. 1, National Council of Teachers of English, Champaign, Ill., 1963. 92p.
6.
McClellan, Jack.Creative Writing Characteristics of Children. Unpublished doctoral dissertation, University of Southern California, 1956.
7.
Servey, Richard Edwin.The Effects of the Situation on the Quality of Children's Writing. Unpublished doctoral dissertation, University of Southern California, 1959.
8.
Wilson, Louis Ada.A Study of Some Influencing Factors Upon and the Nature of Young Children's Written Language. The Journal of Experimental Education, 1963, 31, 371-380.
9.
Yamamoto, K.Creative Writing and School Achievement . School and Society, 1963, 91, 307-308.