Who had given the Minimal, Middling and Maximum theories of reference service?
A. C. M. Winchell
B. S. R. Ranganathan
C. James I Wyer
D. Samuel Rothstein
Answer:D
Who had given the Minimal, Middling and Maximum theories of reference service?
A. C. M. Winchell B. S. R. Ranganathan C. James I Wyer D. Samuel Rothstein