Chadalavada Pichhaia was a Communist party core leader until 1948. Later, he came out of it and criticised its leadership on various grounds that includes deceiving the untouchables
P. Balakrishna was a Dalit activist during 1930s & 40s. Harijanabhyudayam is a brief history of social reform movement and Dalit movement in Andhra during since late nineteenth century to 1947