All about Discus by Herbert R. Axelrod and Leonard P. Schultz (1972, Hardcover)

All About Discus by Dr. Herbert R. Axelrod (1978) Vintage, Rare, Aquarium, Hobby

All About Discus by Herbert R. Axelrod

ALL ABOUT DISCUS By Herbert R Axelrod Hardcover Fish Care Breeding Health Guide

AFRICAN CICHLIDS OF LAKES MALAWI AND TANGANYIKA By Herbert R Axelrod & Warren E

The Allure of Discus by Herbert R. Axelrod; Bernd Degen

Guppies By Herbert R. Axelrod & Wilfred Whitern 1957 Vintage Paperback Book

Breeding Aquarium Fishes, Book 2 by Herbert R. Axelrod