共 50 条
- [42] 1991 MINERAL EXPLORATION STATISTICS - UNITED-STATES AND CANADIAN COMPANIES [J]. ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, 1993, 88 (02): : 495 - 502
- [48] SUMMARY STATISTICS ON GRADUATE MEDICAL-EDUCATION IN THE UNITED-STATES [J]. JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1984, 252 (12): : 1545 - 1553
- [49] UNITED-STATES BIRTH STATISTICS, JANUARY-APRIL 1953 [J]. PUBLIC HEALTH REPORTS, 1953, 68 (08): : 788 - 788
- [50] 1992 MINERAL EXPLORATION STATISTICS - UNITED-STATES AND CANADIAN COMPANIES [J]. ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, 1994, 89 (04): : 960 - 967