00397naa a2200145 a 450000100080000000500110000800800410001910000210006024500790008126000090016065000090016965300100017865300130018877300500020119189582018-07-25       1948    bl uuuu     u00u1 u    #d1 aFERRAZ, J. de S.  aCausas prováveis das secas do Nordeste Brasileiro.h[electronic resource]  c1948  aSeca  aCausa  aNordeste  tBoletim Geográficogn. 63, p. 210-228, 1948.