Genre
Electronic books
905
Internet resources
41
Problems, exercises, etc
25
Biography
23
Handbooks, manuals, etc
22
Outlines, syllabi, etc
18
Popular works
18
Congresses
15
Libros electrónicos
15
Libros electrónicos
12
Textbooks
9
Laboratory manuals
8
Computer network resources
7
Conference papers and proceedings
5
Biographies
4
Miscellanea
4
Early works to 1800
3
Examinations, questions, etc
3
Juvenile literature
3
Problems and exercises
3
Software
3
Amateurs' manuals
2
Catalogs
2
Classification
2
Dictionaries
2
Handbooks and manuals
2
Identification
2
Laboratory manual
2
Periodicals
2
Pictorial works
2
Study guides
2
Case studies
1
Correspondence
1
Diaries
1
Exhibition catalogs
1
Exhibitions
1
Experiments
1
Exploration
1
Facsimiles
1
Fiction
1
Humor
1
Manuales de laboratorio
1
Manuales, etc
1
Notebooks, sketchbooks, etc
1
Observations
1
Périodiques
1
Pre-Linnean works
1
Tables
1
Terminology
1
Textbook
1
more ...