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Books about Gryazev:
Gryazev, Vasilij Petrovich
Wiki information Gryazev:
The Gryazev-Shipunov GSh-23 is a twin-barreled 23 mm autocannon developed in the Soviet Union, primarily for military aircraft use. It entered service in 1965, replacing the earlier Nudelman-Rikhter NR-23 cannon. The GSh-23 works on the Gast Gun...
The Gryazev-Shipunov GSh-30-1 is a 30 mm cannon designed for use on Soviet and later Russian military aircraft, entering service in the early 1980s. Its current manufacturer is the Russian company Izhmash JSC.