Hinduism in Tanzania (and East Africa) (Karline McLain, Fall 2007)
Bharati, Swami Agehananda. 1972. The Asians in East Africa. Chicago: Nelson-Hall.
Markovits, Claude. 2000. The Global World of Indian Merchants, 1750-1947. Cambridge: Cambridge University Press.
[In terms of the Lohana community, many if not all of them are Sindhi Hindus. This is the major work on Sindhi Hindus from a historical perspective. Scott Levi has done additional work, but he focuses more on Central Asia. Steven W. Ramey has also done a little bit of work on Sindhi Hindus and the lived religious experiences available, specifically a recent piece in Numen, but has not dealt with East Africa specifically.]
Savita Nair at Furman University has worked on migration issues of Indians to East Africa from a historical perspective:
Nair, Savita. Forthcoming. Shops and Stations: Negotiating Space and Politics in Colonial Kenya in John Hawley (ed.), Africa in India, India in Africa (Indiana University Press)
Nair, Savita. 2003. Diaspora: Africa in Peter Claus and Margaret Mills (eds.), South Asian Folklore: An Encyclopedia (Routledge).
Ramji, Payal B. 2007. Negotiating Identities: Asian communities in Tanzania. MA Thesis: University of Wisconsin-Madison.
[Masters thesis: the thesis as well as the bibliography could be useful.]
Salvadori, Cynthia. 1989. Through Open Doors: A View of Asian Cultures in Kenya. Nairobi, Kenya: Kenway Publications.
[Though on Kenya rather than Tanzania, it has a wealth of information on different groups and migration trajectories which might provide useful background for comparison.]
Williams, Raymond Brady. 2001. An Introduction to Swaminarayan Hinduism. Cambridge: Cambridge University Press.
[The final chapter has a section on the history of that Hindu group in East Africa.]
Younger, Paul. Forthcoming chapter on East African Hinduism in a volume on indentured societies.