Occasionally, the same work is published twice in a single year. In order to distinguish such publications from one another, a device is used with the date portion of the classification number. Suppose you have three different editions of Esslemont's Bahá'u'lláh and the New Era, all published in 1997. To differentiate, the first one classified will be BP365 .E8 1997. The second will have the date 1997a,
and the third will be 1997b.



Classification and Cataloguing

Cataloguing is related to classification. Those unfamiliar with bibliographic description of publications should consult The Anglo-American Cataloguing Rules, professional librarians, or the Bahá'í World Centre Library and its Web page for additional information.