00000nas 2200000zi 4500 9.871405 CaOODSP 20241203113647 m o d f cr ||||||||||| 190410d19671977oncar p o f0###a0eng|d CaOODSP eng rda CaOODSP eng fre n-cn--- En58-23E-PDF En58-23-PDF Noctilucent cloud data ... Alaska, Canada, Greenland and Iceland. Données de nuages nocturnes ... Alaska, Canada, Groenland, Islande 1972-1977 Toronto, Ontario : Department of Transport, Meteorological Branch, [1968-1978?] Annual text txt rdacontent computer c rdamedia online resource cr rdacarrier Began with 1967?; ceased with 1974-1977? Digitized edition from print [produced by Environment and Climate Change Canada]. Text in English 1967-1971; Text in English and French 1972-1977. Issued 1968-1970 by the Department of Transport; 1971-1972 by the Department of the Environment. Noctilucent clouds gccst Meteorological data Canada. Environment Canada. Canada. Department of Transport. Canada. Meteorological Branch‏. Canada. Atmospheric Environment Service. Noctilucent cloud data ... Alaska, Canada, Greenland, Iceland = fre (CaOODSP)9.871434