cdigital.dgb.uanl.mxcdigital.dgb.uanl.mx/la/1080012383/1080012383_14.pdf · greatly to its strength...
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cdigital.dgb.uanl.mxcdigital.dgb.uanl.mx/la/1080012383/1080012383_14.pdf · greatly to its strength by fortifying the approaches. and commanding heights. A close reconnoissance was