50 Films that changed Bollywood

In this, she may not exactly be correct as there have been references to Bollywood since the 1970s and Gupta has a disclaimer: "There have been as many definitions of what Hindi cinema and Bollywood was and is, and the differences between the two, as there have been opinions on the origins of the term 'Bollywood', voiced and argued over by eminent scholars and social scientists and other worthies."