Digital Migration

If ever there was a need for migration of digital data, this is it:  the American people's response to a national tragedy.  Data was collected after Kennedy's assassination on November 22, 1963 in the form of punch cards.  After 9/11, a group wanted to replicate the study, but where to find the original data?  Please link to the following blog article in the Library of Congress' Digital Preservation blog The Signal:

http://blogs.loc.gov/digitalpreservation/2011/11/digital-preservation-and-the-1963-kennedy-assassination-study/

Such a wonderfully concise explanation.

Here's a pic of a punch card machine:

Punch Cards!, by DanCentury, on Flickr