Explore the advanced search options on the Beck eLibrary. Specifically, identify what criteria can be used for an advanced search (e.g., author, title, keyword, ISBN), and determine if there are options to search within specific publication types or date ranges directly from the advanced search interface.
Navigate to 'https://beck-elibrary.de/'. Click on the 'Erweiterte Suche' (Advanced Search) button (ID 108). Identify and list all available search criteria or fields on the advanced search page. Determine if there are options to filter searches by publication type or date range directly within the advanced search form. Describe the capabilities of the advanced search feature.
The agent successfully navigates to the advanced search page. The agent lists the specific search fields available (e.g., 'Alle Felder', 'Titel', 'Autor/Hrsg.', 'ISBN/ISSN', 'Volltext'). The agent identifies whether publication type and date range filters are present directly on the advanced search form. The agent provides a concise summary of the advanced search capabilities.