Archival inquiries in Ukraine are pretty straight forward. There is no prepayment. Once the Archives has ascertained that they can indeed help you, they will notify you and tell you what sort of info is available and what the cost to you will be.
State Archive of Dnipropetrovsk Oblast
http://www.huri.harvard.edu/abb_grimsted/O-6.html
Archives of Ukraine - Questions and Answers
http://www.scarch.kiev.ua/Eng/q-a.php
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Before submitting an archival inquiry check through the various Mennonite Libraries/Resources available.
Mennonite Centre in Ukraine
http://www.mennonitecentre.com/Directors.html
Description of the Research Program in Russian and East European Mennonite Studies
http://www.chass.utoronto.ca/~khor99/description.html
MHSC
http://www.mhsc.ca/index.asp?content...ts/E773ME.html
MB Bulletin.REVISED2
http://216.239.37.104/search?q=cache...hl=en&ie=UTF-8
Reinlaender Gemeinde Buch
http://www.mmhs.org/canada/reinland.htm
Canadian Mennonite Genealogical Resources
http://www.mmhs.org/canada/mmhsgen2.htm
MENNONITE ARCHIVES AND LIBRARY - HomePage
http://feefhs.org/men/frg-ma&l.html
Mennonite Genealogy Cross-Index
http://feefhs.org/men/indexmen.html
Immigration to Manitoba
http://freepages.genealogy.rootsweb..../delegate.html
Mennonite Church USA Historical Committee and Archives | Home page for mcusa-archives.org
http://www.goshen.edu/mcarchives/
CCMB: Services: CMBS
http://www.mbconf.ca/mbstudies/index.en.html