-AVIFAUNA No. 13 
Second Ten Year Index to The Condor 
By J. R. PEMBERTON 
92 pages and cover 
A thorough-going index to the large mass of ornithology comprized in 
volumes XI to XX, inclusive, of THR CoNDOR. Segregates the informa- 
tion by species under all the different names employed; also by authors; by 
states and countries, in California by counties, and by subject-matter. 
Obviously indispensable to every live student of birds. The management 
urges prompt orders; so that the heavy expense involved in the publication 
of this number of the Avifauna series may be met without the necessity of 
curtailing the size of the current issues of THE CONDOR. 
Members of the Cooper Ornithological Club may take the regular 
Club discount (50% ). 
Price, prepaid, $3.00 
[To Club members, $1.50] 
W. LEE CHAMBERS, Business Manager 
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Eagle Rock, Los Angeles County, California 
