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<br />A PROPOSAL TO MAKE <br />GEOLOGIC AND HYDROLOGIC MAPS OF THE <br />SAN MARCOS AREA <br />BY <br />ALBERT E. OGDEN, PH.D. <br />ASSISTANT DIRECTOR AND HYDROGEOLOGIST <br />GLENN LONGLEY, PH. D., DIRECTOR <br />EDWARDS AQUIFER RESEARCH AND DATA CENTER <br />SAN MARCOS, TEXAS 78666 <br />