Titre:First follow-up questionnaire, form A /
Auteur:Research Triangle Institute; États-Unis. Office of Education; États-Unis. Department of Health, Education, and WelfareDate:1973.
Titre:Second follow-up questionnaire /
Auteur:Research Triangle Institute; États-Unis. Department of Health, Education, and Welfare; États-Unis. National Center for Education StatisticsDate:1974.