| Thank you for holding on, your call is important to us. Although I suspect you've moved on and are no longer hunched over your monitor eagerly waiting for a reply, here's some oldies you could hunt down, should you return.
Russian Aircraft since 1940 - Jean Alexander 1975
The History of Soviet Aircraft - Vaclav Nemecek 1986
Aircraft of the Soviet Union - Bill Gunston 1983
Soviet Aircraft Directory Green and Swanborough 1975
Combat Aircraft Prototypes - Robert Jackson 1985 | 
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