| 词条 | Cardinal Edition |
| 释义 |
Footnotes1. ^{{cite web |url=http://paperbarn.www1.50megs.com/Paperbacks/paperbackpub2.html |title=PAPERBACK PUBLISHERS 1951 ---PERMABOOKS |author=HYDE PARK BOOKS |accessdate=2008-03-12 |df= }} {{publisher-stub}} 1 : Book publishing company imprints |
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开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。