Genre
Congresses
58
Periodicals
19
Handbooks, manuals, etc
14
Catalogs
5
Amateurs' manuals
2
Amateur's manuals
1
Archives
1
Conference papers and proceedings
1
Directories
1
Drawings
1
Exhibitions
1
Fiction
1
Formulae
1
Handbooks
1
Handbooks, manuals etc
1
Popular works
1
Problems, exercises, etc
1
Sources
1
Standards
1
Statistics
1
Study guides
1