Jukka:
1. Buy this book. It cost to me 290 Russian Rubles (1$ = ~23 RUR).
2. Scan the book, and "read" it using FineReader, converting "paper" into "digital image" and then into "word text" format.
3. Use online translators, to translate it from russian to any language You want. Words are commonly equal:
"pilot ... was shot down by ...", "combat mission", "fighters", e.t.c. All the same.
Of course, there could be problems with translation.
If You have any russian speaking friends, they could help You in direct words or frases.
And then You may even publish YOUR translated variant, of course with some additions e.t.c.