Genre
Congresses
24
Handbooks, manuals, etc
8
Laboratory manuals
6
Congress
5
Conference papers and proceedings
4
Electronic book
2
Periodicals
2
Technical reports
2
Aufsatzsammlung
1
Bildband
1
Documentary films
1
Electronic books
1
Environmental aspects
1
Formulae
1
Handbooks and manuals
1
Legislative hearings
1
Patents
1
Periodical
1
Problems, exercises, etc
1