

Can you read Russian?
Asymmetric Economy (Асимметричная экономика) (2012) by Kurman Akhmetov (pseudonym of the Kazakh economist Bakhytzhan Auelbekov) described extensively the economic model of Stalin’s USSR, particularly on the dual circuit monetary system.
Valentin Katasonov’s Stalin’s Economy (Экономика Сталина) (2014) and Alexander Galushka’s Crystal Growth (Кристалл роста) (2020) also variously extended the research on the subject.
Note that prior academic research on Stalin was very much limited or even distorted as the full rehabilitation did not occur until 2008 under Putin.
However, perhaps the most comprehensive description and a primary source on the monetary system during Stalin’s time is A. D. Gusakov’s Money Circulation and Credit of the USSR (Денежное обращение и кредит СССР) published by Gozfinizdat (State Financial Publishing House) in 1951.
It’s been a side project/hobby for me to slowly go through the books with machine translation to re-examine the genius of Stalin’s economic model with an MMT lens.
I just translate to English paragraphs by paragraphs lol, it’s easier that way. I am very slowly working through them but it’s an interesting look at a system where there is virtually no source on it in English or any other languge.