Replacing attribute text, multiple drawings

[Anonymous]

I will lay out my scenario with the hope of a solution.

I have multple drawings, 300 or so, with text inside of an attributed block.  The tag in the attribute block is unique as no other tag is the same in any of the drawings.  The incorrect text has been enter into the attribute.  I need to replce the text in that attirbute to the coorect text. 

Is there a way sto do this without opening all 300 drawings, clicking on the attribute, and entering the new text.  Thanks.