DeWeerd, J. & Cole, A. (1976). Handicapped Children's Early Education Program . Exceptional Children, 43, 155-157.
2.
Fruherziehung Interdisziplinar, 1, 1982.
3.
Journal of the Division for Early Childhood, 1(1), 1979.
4.
Swan, W.W. (1984). State policy and service achievements in early childhood special education. Educational Evaluation and Policy Analysis, 6(4), 425-434.