Fathers of the SU-152

 "Order to the People's Commissariat of Tank Production #764s
Chelyabinsk
November 13th, 1942

On the creation of an SPG design group

In accordance with the order issued by People's Commissar of Tank Production comrade I.M. Zaltsman on the creation of SPGs on the KV and T-34 tank chassis, I order to:

1. Create an SPG design group within the Kirov factory's design bureau, as the factory is a producer of both T-34 and KV tanks.
2. Appoint engineer Lev Sergeyevich Troyanov to the position of Deputy Chief Designer of Tank Production at the Kirov Factory. Task him with leading the SPG design group.
3. Director of the UZTM factory comrade Muzrukov must permanently transfer designers Kurin, Ilyin, Rybin, and Vishnyakov to the Kirov factory by November 15th, 1942.

Deputy People's Commissar of Tank Production, Kotin"

Via Yuri Pasholok