NEW YORK, April 29, 2013 /PRNewswire/ -- OTC Markets Group Inc. (OTCQX: OTCM), operator of Open, Transparent and Connected financial marketplaces, today announced that Potash Ridge Corporation (OTCQX: POTRF; TSX: PRK), a Canada-based mining company, has chosen to trade on OTCQX®, the best OTC marketplace with qualified companies.(Logo
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