Arnold gives advice on trap development.Source: Muscle Builder Power (March 1975) Page #40 - Muscle Builder Power (Mar 1975) Page #41 - Muscle Builder Power (Mar 1975) Page #42 - Muscle Builder Power (Mar 1975) Page #43 - Muscle Builder Power (Mar 1975) Page #74 - Muscle Builder Power (Mar 1975) Page #77 - Muscle Builder Power (Mar 1975)