Complex sentence: He first went to Bangladesh to undertake a fifteen month period of village level fieldwork for a PhD on agricultural technologies and agrarian change, later published as a book,'Technologies and Transactions', by Dhaka University in 1991.
Split into simpler sentences: He first went to Bangladesh to undertake a fifteen month period of village level fieldwork for a PhD on agricultural technology and agrarian change. This was later published in book forms as'Technologies and Transactions', by Dhaka University in 1991.