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Geophysical series, NTS 40 I and part of 40 J, 40 O, 30 L and 30 M, airborne geophysical survey, southern Ontario / Série des
cartes géophysiques, SNRC 40 I et partie de 40 J, 40 O, 30 L et 30 M, levé géophysique aéroporté, sud de l'Ontario; Carson, J M;
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https://doi.org/10.4095/247787 
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