共 50 条
- [25] HEALTH ECONOMICS IN DEVELOPING-COUNTRIES JOURNAL OF TROPICAL MEDICINE AND HYGIENE, 1989, 92 (04): : 229 - 241
- [30] AGROMETEOROLOGICAL SERVICES IN DEVELOPING-COUNTRIES - ASPECTS OF COST-EFFICIENCY AGRICULTURAL METEOROLOGY, 1981, 23 (04): : 287 - 292