About Book
The arrangement of the catalogue is explained on pages ix-xv of volume one. To help users, abbreviations of depositories of type material, distributional abbreviations and the subdivisions of Russia and China are repeated in each volume including this one. Data from literature up to and including 2011 are included. Information available only on the internet was not used. For new country records, references are given. Some additional unpublished records are included with a reference to the source (collector or collection). References to volumes 1-5 are given as CPH1-5 followed by a page number.
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