Helge,D.I. (1981). National research identifying problems in implementing comprehensive special education programming in rural areas. Exceptional Children, 47(7), 514–520.
2.
Helge,D.I. (1984). The state of the art of rural special education. Exceptional Children,50(4), 294–305.
3.
Smith-Davis,J., Burke,P.J., & Noel,M. (1984). Personnel to educate the handicapped in America: Supply and demand from a programmatic viewpoint.Institute for the Study of Exceptional Children and Youth, Department of Special Education, University of Maryland, College Park, Maryland.