共 105 条
[71]
ODGAARD R, 1986, TANZANIA CIRSIS STRU, V2, P207
[72]
Otunnu O., 1992, Refug Canada's J Refug, V12, P11, DOI [10.25071/1920-7336.21640, DOI 10.25071/1920-7336.21640]
[73]
Panayotou T, 1994, CAUSES TROPICAL DEFO, P192
[75]
*PBS, 2002, SURV DUST BOWL
[77]
PICHON F, 1999, POPULATION DEFORESTA
[78]
Rahmato D., 1991, Famine and survival strategies: A case study from North east Ethiopia
[79]
ROPER T, 1996, GEODATE, V9, P1