Not sure if this is the best place to send you resources but this might be of interest:
- https://www.hgwdavie.com/blog/2018/3/9/the-influence-of-railways-on-military-operations-in-the-russo-german-war-19411945
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https://history.army.mil/html/books/104/104-24/CMH_Pub_104-24.pdf
(Especially about the side-line connecting the Murmansk line to the Archangel line, built 1938-1941, just in time)