Ray Mentzer provides useful training tips for a better developed chest.Source: Muscle & Fitness (Issue Apr 1980) Page #58 - Muscle & Fitness (Issue Apr 1980) Page #59 - Muscle & Fitness (Issue Apr 1980) Page #60 - Muscle & Fitness (Issue Apr 1980) Page #61 - Muscle & Fitness (Issue Apr 1980) Page #104 - Muscle & Fitness (Issue Apr 1980)