There are many free electronic resources to use if you're looking for additional Dalit resources. Below are some resources through the Digital Library of India, a list of associations/advocacy groups, and some free online periodicals.
The Digital Library of India (DLI) is a digital collection of freely accessible rare books collected from various libraries in India. DLI project started in early 2000 with the vision to archive all the significant literary, artistic and scientific works of mankind and to preserve digitally and make them freely available.
This includes access resources about Dalits:
The following associations are advocacy groups and non-profice organizations that focus upon Dalit liberation or support human rights issues in general.