4 ms·

Do you happen to remember any specific textbook? I'd be interested to see an example, assuming that they're still available in some format.

• udev 5y ago
  See my reply to other similar question in this thread.
• rramadass 5y ago
  Many of the Soviet-era textbooks (mainly by Mir Publishers) are now published by low-cost Indian publishers and available on Amazon.in. Just search Amazon.in for Piskunov, Irodov, Vygodsky etc.