255 



53. If the author is unknown, the title of the book can appear 

 in the subject-index only. Unless the book is published by a 

 society, or hi honour of a savant, in which case the society, or 

 the savant, as the case may be, can sometimes appear as author. 



54. If ihe author is known, with certainty, though his name 

 does not appear on the title-page, it is nevertheless to be given, 

 but it must then be placed within square brackets [ J. 



55. If the author writes under a pseudonym, the title should 

 appear under the real name (if known with certainty). The 

 real name must then be placed within square brackets. But a 

 separate index slip must be prepared giving the pseudonym 

 followed by v. and the author's real name. This slip must, of 

 course, bear the Registration Letter. 



56. If there are several authors the title will be indexed 

 under the first name given. But a separate index slip must be 

 written for each of the other authors, giving that author's 

 name followed by v., and the name of the author first men- 

 tioned, e.g. : — 



Haase, Hermann v. Freund, Martin. 



Nothing else need appear on such cross-reference slips except 

 the Registration Letter of the science. 



In this and in all other cases where a wavj' line is prescribed, 

 it is only intended to be used in written and type-written slips. 

 It is an indication to the printer to print in Clarendon type. 

 Where the shps are printed, Clarendon or thick-letter type should 

 be used for words underneath which the wavy line would have 

 been written. 



57. In collections of articles by several independent authors 

 a separate slip must be written for each author. Each slip must 

 give the title of the collection as well as the titls of the author's 

 paper. 



58. The third entry upon the authors' slips is the title. 



The titles are to be given in the original language in Roman 

 script (but see 43), but when that language is not cue of the five 

 languages, English, French, German, Italian, or Latin, the title 

 shall be translated into English, or into such other of the above 

 five languages as may be determined by the Regional Bureau 

 concerned. In such cases the actual title is to be written first, 

 followed by the translation within square brackets [ ]. 



50. In the entries upon the slips for the Authors' Index there 

 is a difference between books and papers contained in journals. 

 The slips must contain : — 



A. — In the case of hooks or separately published pamphlets : — 



(a) The Hegisiration Letter {see Section 8). 



(b) The Authors Name (see Sections 51-57). 



