Where is tome data in Megaman 3

There are 3 tomes. The first is obtained from a Navi in Undernet Square for 7000 Zennys. The second is obtained from a Navi in Undernet 6 after battling him to work out his nerves (sort of a net battle massage? Whatever.). Be careful -- his viruses are pretty tough. The third and final one is obtained from a Navi in Undernet 3 for a Magnum1 A chip (available from Bashers in WWW comps).