1. Britannica,
Britannica, Book of the year 2011 / [editor Karen Jacobs Sparks]. Chicago ; London ; New Delhi : Encyclopaedia Britannica, c2011. 880 s. ISBN 978-1-61535-452-8 :. ISSN 0068-1156.[1, currently available 0, at library only 1]
Část: 2011
II-N31068/2011; 03 (BRI)