Columbia subject headings:
Information science--Philosophy--Congresses.
Library science--Philosophy--Congresses.
Ranganathan, S. R. (Shiyali Ramamrita), 1892-1972--Congresses.
Harvard subject headings:
Information science--Philosophy--Congresses.
Library science--Philosophy--Congresses.
Ranganathan, S. R. (Shiyali Ramamrita), 1892-1972--Congresses.
Princeton subject headings:
Information science--Philosophy--Congresses.
Library science--Philosophy--Congresses.
Ranganathan, S. R. (Shiyali Ramamrita), 1892-1972--Congresses.