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HEUMINSKI AVILA, A. M. .; BERLATO, M. A. .; SILVA, J. B. .; FONTANA, D. C. . PROBABILITY OF A MONTHLY RAINFALL BEING EQUAL TO OR G REATER THAN POTENTIAL EVAPOTRANSPIRATION DURING THE GROWING SEASON OF SPRING-SUMMER CROPS IN THE STATE OF RIO GRANDE DO SUL. PESQ. AGROP. GAÚCHA 1995, 2, 149-154.