The aim of the article is to present the structure of the common archive of the Samizdat and Non-traditional Printing Sector of the Laboratory of Book Studies of SPSTL SB RAS formation on the example of the main storage units – personal collections of writers, artists, cultural figures and musicians. It provides classification of the existing unpublished sources in the sector’s collections, analyzes authorial materials, dedications, autographs, drawings and markings, mentions of the alternative printing process authors and participants in periodicals and correspondence. The article describes the sources of samizdat and non-traditional printing, existing in the sector, reveals the content of the main thematic directions. It characterizes archival units on the examples of alternative book publishing, various forms of samizdat, ephemera, ego-documents, fragments of personal libraries, examples of periodical printing. It also offers the classification of personal collections based on temporal periodization, thematic and territorial characteristics. The analysis of the content of the presented sources bases on the personal collections of M. Baturin, I. Akhmetiev, V. Ivaniv, O. Volov, E. Shurygin, E. Iordansky, A. Chekanov, as well as various unofficial creative communities and groups. Special attention is paid to the formation of communication chains and links between authors in the informal cultural environment, in the field of samizdat and alternative book publishing from the 1960s to the 2010s that clarifies the criteria of such ties.