http://www.icpsr.umich.edu/DDI/org/Revisions-Manual8-15-05.pdf
Sanda Ionescu,
Research Associate
Inter-university Consortium for Political and Social Research (ICPSR)
The University of Michigan
P.O. Box 1248
Ann Arbor, MI 48106
Phone: (734) 615-7890
Fax: (734) 615-7890
(734) 647-8200