These are some of the books I have used
Books
1. Dr. Axelrod's Atlas of Freshwater Aquarium Fishes
2. Dr. Axelrod's Mini-Atlas of Freshwater Aquarium Fishes
3. The Freshwater Aquarium - An Owner's Guide to a Happy
4. Handbook of Tropical Aquarium Fishes
5. Oscars : Keeping & Breeding Them in Captivity
All can be found at
