共 50 条
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- [43] RADIOLOGICAL PROTECTION PROBLEMS IN DEVELOPING COUNTRIES HEALTH PHYSICS, 1970, 19 (01): : 94 - +
- [44] PROBLEMS AND PROSPECTS OF METROLOGY IN DEVELOPING COUNTRIES MEASUREMENT TECHNIQUES-USSR, 1970, (10): : 1599 - &
- [47] SOME PROBLEMS OF AID TO DEVELOPING COUNTRIES ZEITSCHRIFT FUR NATIONALOKONOMIE-JOURNAL OF ECONOMICS, 1966, 26 (1-3): : 240 - 259
- [48] PROBLEMS OF RESEARCH IN DEVELOPING-COUNTRIES LANDBAUFORSCHUNG VOLKENRODE, 1974, 24 (01): : 6 - 9