National longitudinal study base year, first, second, and third follow-up data file users manual / by Jay Levinsohn ... [et al.], Center for Educational Research and Evaluation, Research Triangle Institute. (Sponsored reports series) (DHEW publication ; no. (NCES) 78-239)
National longitudinal study base year, first, second, and third follow-up data file users manual / by Jay Levinsohn ... [et al.], Center for Educational Research and Evaluation, Research Triangle Institute.
Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off.