Genre
Congresses
251
Handbooks, manuals, etc
44
Periodicals
40
Case studies
25
Amateurs' manuals
12
Pictorial works
10
Biography
9
Problems, exercises, etc
7
Designs and plans
4
Electronic books
3
Juvenile literature
3
Specifications
3
Tables
3
Design and construction
2
Popular works
2
Textbooks
2
Archives
1
Catalogs
1
Charts, diagrams, etc
1
Computer simulation
1
Correspondence
1
Drawings
1
Exhibitions
1
Fiction
1
Formulae
1
Guidebooks
1
Journals
1
Manuels d'amateurs
1
Safety measures
1
Sources
1
Standards
1