00000nas 2200000za 4500 9.835819 CaOODSP 20221107150744 cr ||||||||||| 170426d19761986onc x m ot f0###|0eng|d CaOODSP eng n-cn--- M74-3E-PDF Open file (Earth Physics Branch) Open file [electronic resource] / Earth Physics Branch. Some issues have parallel title: Dossier public de la Directions de la Physique du Globe Earth Physics Branch open file report Ottawa : Energy Mines and Resources Canada, Earth Physics Branch, [1976?]-[1986]. Irregular Digitized editions from print [produced by Natural Resources Canada]. gccst Earth sciences Canada. Natural Resources Canada. Canada. Earth Physics Branch.