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Arpa-docs provides some possibilities, which makes your search more flexible:

Below there are a few examples of search queries:

1.Letters to Heinrich Bullinger, written from Italy in 1530 or later

2.Articles of church thematic in "Basler Nachrichten" from Basel.

3.Find musicians in "Allgemeine Deutsche Biographie",
who lived in Munich or Lepzig in 17th century