SPI ...\spi_monthly.exe ...\spi_weekly.exe ...\src ...\...\ghcn_filter.c ...\...\ghcn_filter.f ...\...\Makefile ...\...\mon_filter.c ...\...\rd_prec.c ...\...\spi.c ...\...\spi.f ...\...\spi.h ...\...\spi_empiric.c ...\...\spi_gamma.c ...\...\spi_rpt.c