Dwight Goddard collected a sample of Buddhist scriptures, with the emphasis on Zen, along with other classics of Eastern philosophy, such as the Tao Te Ching, into his 'Buddhist Bible' in the 1920s. More recently, Dr. Babasaheb Ambedkar attempted to create a single, combined document of Buddhist principles in "The Buddha and His Dhamma". Other such efforts have persisted to present day, but currently there is no single text that represents all Buddhist traditions.
Goddard collected mainly what type of Buddhist scripture?
Zen