Code for classifiers;
principles governing the consistent placing of books in a system of classification.

APA Citation

Merrill, W. Stetson. (1939). Code for classifiers: principles governing the consistent placing of books in a system of classification. 2d ed. Chicago: American Library Association.

MLA Citation

Merrill, William Stetson. Code for Classifiers: Principles Governing the Consistent Placing of Books In a System of Classification. 2d ed. Chicago: American Library Association, 1939.

Warning: These citations may not always be complete (especially for serials).