A short chronological history of archaeological discoveries made at Harappa beginning in 1826 and ending in 1990.
From the article
"Since the first publication of material in 1872, the site of Harappa has provided focus for protohistoric archaeological investigations in the Punjab region of northwestern South Asia. The current University of California, Berkeley, project us here put into context of earlier work at the site and into the context of the history of archaeology in the Greater Indus Valley as a whole."
Chapter 2 of Harappa Excavation Reports 1986-1990