TY - BOOK AU - Bryson,Reid A. TI - Normal 500 mb charts for the Northern Hemisphere: annual, seasonal, and monthly, with monthly standard deviations T2 - AFCRC-TN-58-404 AV - QC1 .U53 no. 58-404 U1 - 551.54 PY - 1958///] CY - Madison PB - U.S. Navy Weather Research Facility KW - Atmospheric pressure KW - Maps N1 - "ASTIA No. AD-152531."; Research sponsored by the Geophysics Research Directorate of the Air Force Cambridge Research Center, Air Research and Development Command, under Contract no. AF19 (604)-922; Errata slip inserted ER -