"Medical Research Personnel" . . . . "Biomedical Research education United States Statistics." . . "Education, Graduate trends United States Statistics." . . "Special report on five-year trend in graduate enrollment and ph.d. output in scientific fields at 100 leading institutions : 1959-60 to 1963-64" . . "Special report on five-year trend in graduate enrollment and PH. D. output in scientific fields at 100 leading institutions 1959-60 to 1963-64"@en . . . . . . . . . . . "Statistics" . . . . . . . . . "Natural Science Disciplines education United States Statistics." . . "Education, Graduate statistics & numerical data United States." . .