This website offers two search engine tools, Google Custom Search and WordPress Database Search.
WordPress Database Search
A WordPress Search on this website presents every result per search query, but requires patience and practice to scroll through everything. It does not offer search results from pdfs or the Flickr page, but does give great detail for the 10,000 pages on the site. This engine is best used for researchers, academics, and anyone seeking a complete knowledge on what the site has on any subject.
Google Custom Search
A Google Search on this website presents the top 100 results per search query in a familiar and easily-accessible format. It also includes search results from the site’s Flickr photo archive, as well as pdfs linked to the site. It is less comprehensive than the WordPress tool, but remains adequate for general informational queries.