The library has a wide selection of material in languages other than Danish, particularly a large number of labour movement publications in English and German from many countries are available, German being most important during the period before 1945, since then English has become more predominant. There are also protocols, analyses, and expositions of central importance in Norwegian, Swedish, Finnish, and French.
Periodicals supplement the collections.
The circulars and periodicals issued by the political and trade union Internationals are virtually all available from the time just after the turn of the century until today, as are many of those issued by the International Trades Secretariats. The Archive contains 1500 organisational archives, i.a. As these organisations have always had close international relations, their archives include correspondence with parties and unions abroad, circulars and protocols from international congresses and meetings, and material originating in the Secretariat of the International in Brussels during the years from 1900 to 1914. This is also true for material from the Socialist Youth International of the interwar years, and of the Women's International, and the Trade Union International. The Archive contains 220 personal files, some of which are important for the study of the international labour movement.