Non-fiction collection 1810–1972 in the National Collection contains the whole gamut of the non-fiction and scientific literature received as legal deposit copies over 160 years: from alphabet-books and text books to doctoral theses, from histories and anniversary books to registers, from almanacs and calendars to hymn books and bibles, from dictionaries and tourist guides to statistics and official publications and everything in between. The materials have been divided in several field-specific groups, see sub-collections.