Before revision: In the early 20th century, several scientists contributed empirical applications that have become the three fundamental laws of informetrics, Bradford's law, Lotka's law, and Zipf's law, which promote the development of informetrics.
After revision: In the early 20th century, several scientists contributed empirical applications that have become the three basic laws of informetrics, Bradford's law, Lotka's law, and Zipf's law, which promote the development of informetrics.