TY  - BOOK
AU  - Cumming,G.L.et al
TI  - Some dates and subdivisions of the Canadian Shield
T2  - Proceedings of the Geological Association of Canada
PY  - 1955///
CY  - Toronto - CANA
PB  - Geological Association of Canada
KW  - Escudo Canadiense
KW  - Geologia
KW  - Canada
ER  -