Books
URSIgram Codes (1963)
International Ursigram and World Days Service
I.U.W.D.S.
Synoptic Codes for Solar and Geophysical Data 1963
URSIgram Codes (1965)
International Ursigram and World Days Service
I.U.W.D.S.
Synoptic Codes for Solar and Geophysical Data Revised edition 1965
URSIgram Codes (1969)
International Ursigram and World Days Service
I.U.W.D.S.
Synoptic Codes for Solar and Geophysical Data Second Revised Edition 1969
URSIgram Codes (1973)
INTERNATIONAL URSIGRAM AND WORLD DAYS SERVICE
IUWDS
Synoptic Codes for Solar and Geophysical Data Third Revised Edition 1973
URSIgram Codes (1993)
INTERNATIONAL URSIGRAM and WORLD DAYS SERVICE
I.U.W.D.S.
Synoptic Codes for Solar and Geophysical Data RWC Tokyo
