1934/35=17,1; 1936/37=17,2; 1938/39=17,A,1[vielm. 22,A,1]; 1940/41=17,A,3; 1942/44=17,A,4; 1945/46=17,B,1; 1949=17,B,3; 1950/51=23,1; 1952/54=23,2; 1955/56=23,4; 1957/58=23,3 von: Dominion Observatory (Ottawa): Publications of the Dominion Observatory, Ottawa (ISSN: 0369-7150)
Zugl. einzelne Bd. von: Kanada. Earth Physics Branch: Publications of the Earth Physics Branch (ISSN: 0373-4838)