TY - RPRT TI - The Palmer Drought Severity Index: limitations and assumptions. AU - W.M. Alley PY - 1984 DO - 10.1175/1520-0450(1984)023<1100:tpdsil>2.0.co;2 UR - https://pubs.usgs.gov/publication/70013882 ID - 70013882 ER -