S.R. Ranganathan. Depth classification: Paper photocopy of annuals of library science vol:3 (1956) pages 33-72. Indian national scientific documentation centre.
Dyfyniad Arddull ChicagoS.R. Ranganathan. Depth Classification: Paper Photocopy of Annuals of Library Science Vol:3 (1956) Pages 33-72. New Delhi: Indian national scientific documentation centre.
Dyfyniad MLAS.R. Ranganathan. Depth Classification: Paper Photocopy of Annuals of Library Science Vol:3 (1956) Pages 33-72. Indian national scientific documentation centre.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.