共 50 条
- [22] UNITED-STATES REGIONAL CHANGES IN TWINNING RATES ACTA GENETICAE MEDICAE ET GEMELLOLOGIAE, 1988, 37 (3-4): : 307 - 311
- [24] SOME PERSONAL OBSERVATIONS ON INDUSTRIAL HEALTH IN THE UNITED-STATES OF AMERICA BRITISH JOURNAL OF INDUSTRIAL MEDICINE, 1954, 11 (03): : 222 - 226
- [25] THE ADMINISTRATION OF UNITED-STATES ANTIDUMPING DUTIES - SOME EMPIRICAL OBSERVATIONS WORLD ECONOMY, 1990, 13 (01): : 75 - 88
- [26] MONOZYGOTIC AND DIZYGOTIC TWIN BIRTH FREQUENCIES IN THE UNITED-STATES POPULATION ANATOMICAL RECORD, 1946, 94 (03): : 404 - 404