There is also a simple search available.
For your search you can use the Booleans and, or and not. Without these Booleans a search with and will be performed.
You can also use question marks to match only the beginnings of words - you cannot put question marks at the front or inside of words.
To search in the categories GOK, DDC, BK, Language and Country you have to enter the respective abbreviations.
There is a list of all used Keywords available.
There is also a list of all used Acronyms and Abbreviations available.
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