For Soviet and Eastern Bloc electronics, a separate ecosystem existed. Books like "Транзисторы: Справочник" (Transistors: Handbook) by В.Л. Аронов and "Полупроводниковые приборы: Транзисторы" provided cross-references between Western (2N, BC) and Soviet (КТ, КП, ГТ, П) series. For example, the common КТ315 is often equivalent to the BC547 or 2N3904.
If you are looking to "put together" a guide for your workbench, here is your shopping list: all transistor equivalent book
If you are a hobbyist building or fixing general circuits, you don't always need a book. You just need to know the "Universal" transistors. For Soviet and Eastern Bloc electronics, a separate
If you are searching for physical or scanned copies, these are the legendary titles: For Soviet and Eastern Bloc electronics
