Only words with 2 or more characters are accepted
Max 200 chars total
Space is used to split words, "" can be used to search for a whole string (not indexed search then)
AND, OR and NOT are prefix words, overruling the default operator
+/|/- equals AND, OR and NOT as operators.
All search words are converted to lowercase.
research
earthquakes
Gebirgsschlag vom 11. September 1996 in Teutschental
Erkundungsmission
Auswertung durch:
H.-G. Schmidt, J. Schwarz (Bauhaus-Universität Weimar)