Complex sentence: During this time, Goldman worked on his master's degree program in Independent Study from Lesley University, researching the uses of sound and music for Healing, which became the main source of material for his first published works.
Split into simpler sentences: During this time, Goldman worked on his master's degree program in Independent Study from Lesley University, researching the Uses of Sound and Music for Healing. This work would later become the main source of material for his first published works.