共 40 条
- [1] [Anonymous], 2003, AFR SECUR REV, DOI DOI 10.1080/10246029.2003.9627566
- [4] CARE & WFP (Cooperative for Assistance and Relief Everywhere and World Food Programme), 2003, COPING STRATEGIES IN
- [5] Cochran W. G., 1963, SAMPLING TECHNIQUES
- [6] *EPU, 2001, 8 MAL PLAN 2001 2005
- [10] Gundersen C, 2001, US DEP AGR EC RES SE, V11, P92