The idea of marketing of library was not started until?

The idea of marketing of library was not started until?

لائبریری کی مارکیٹنگ کا خیال کب تک شروع نہیں ہوا؟
Explanation

The idea of marketing library services is not new to the library world.

This paper shows the development from wishes to improve personal relations between librarians and "the common man in the street" into planned extension work and PR.

Stressing the importance of marketing a library service before measuring library performance, the paper deals with the period from 1876 to the 1970's.