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Aceituno, P. 1988. "On the functioning of the southern oscillation in the South American sector. Part I: Surface climate." Monthly Weather Review 116: 505-24.

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Burroughs, W.J. 1978. "On running means and meteorological cycles." Weather 33: 101-9

Caviedes, C. 1981. "Rain in South America, seasonal and spatial correlations." Erdkunde 35: 10718.

Hastenrath, S. 1978. "On modes of tropical circulation and climate anomalies." Journal of Atmospheric Sciences 35: 2222-31.

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Hastenrath, S., and L. Heller. 1977. "Dynamics of climate hazards in Northeast Brazil." Quarterly Journal of Royal Meteorological Society 103: 77-92.

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Tanaka, M., and T. Nishizawa. 1985. "The atmospheric circulation and the major drought and flood of 1983 in Brazil." Geographical Review of Japan 58 (Ser. B): 165-71.

Tanaka, M., A. Tsuchiya, and T. Nishizawa. 1988. "The empirical orthogonal function analysis of the seasonal and interannual rainfall in Brazil." Latin American Studies 10: 2745.

Tsuchiya, A., M. Tanaka, and T. Nishizawa. 1988. "Empirical orthogonal function analysis of the monthly rainfall in Brazil." Latin American Studies 10: 13-26.

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Walker, G.T. 1928. "Ceará (Brazil) famines and the general air movement." Beitr. Phys. D. Freien Atmosphere 14: 88-93.

Yamazaki, Y., and V.B. Rao. 1977. "Tropical cloudiness over the South Atlantic Ocean." Journal of Meteorological Society of Japan 55: 205-7.

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