共 50 条
- [22] PRESENT SITUATION OF PRODUCTION JAPANESE JOURNAL OF TROPICAL AGRICULTURE, 1980, 24 (04): : 187 - 194
- [28] LOAIASIS - PRESENT SITUATION BULLETIN OF THE WORLD HEALTH ORGANIZATION, 1978, 56 (02): : 155 - 167
- [29] The present patent situation TRANSACTIONS OF THE AMERICAN INSTITUTE OF CHEMICAL ENGINEERS, 1914, 7 : 148 - 152