- MeSH
- International Cooperation * MeSH
- Periodicals as Topic * MeSH
- Publishing * MeSH
- Publication type
- Letter MeSH
- Geographicals
- Czechoslovakia MeSH
- Hungary MeSH
- Poland MeSH
PubMed
1923491
Knihovny.cz E-resources
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AND or + signifies AND operation (intersection)
OR or | signifies OR operation (union)
- negates a single word
" wraps text to signify a phrase
* at the end of a term signifies a right-side expansion
( and ) signify precedence
~N after a word signifies edit distance (fuzziness)
~N after a phrase signifies words distance