Não informado. (1950). Bibliographical Series. Department of Mines and Technical Surveys.
Chicago-Zitierstil (17. Ausg.)Não informado. Bibliographical Series. Ottawa: Department of Mines and Technical Surveys, 1950.
MLA-Zitierstil (8. Ausg.)Não informado. Bibliographical Series. Department of Mines and Technical Surveys, 1950.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.