Key points are not available for this paper at this time.
The material in this project was prepared under Grant No. 91 -37-72-1 5 from the Manpower Administration, United States Department of Labor, under the authority of Title I of the Manpower Development and Training Act of 1 962, as amended. Researchers undertaking such projects under Government sponsorship are encouraged to express freely their professional judgment. Therefore, points of view or opinions stated in this document do not necessarily represent the official position or policy of the Department of Labor.
Cecile Roussell (Sat,) studied this question.