共 50 条
- [22] ERADICATION OF POLIOMYELITIS IN THE UNITED-STATES .3. POLIOVACCINES - PRACTICAL CONSIDERATIONS REVIEWS OF INFECTIOUS DISEASES, 1980, 2 (02): : 258 - 273
- [24] UNITED-STATES HEALTH-CARE .3. THE REFORM PROBLEM BRITISH MEDICAL JOURNAL, 1992, 305 (6859): : 941 - 944
- [29] MAJOR NECTAR SOURCES OF THE UNITED-STATES .3. HERBACEOUS HONEY PLANTS AMERICAN BEE JOURNAL, 1987, 127 (02): : 116 - 117