Genere
Electronic books
Computer network resources
15
Internet resources
14
Congresses
12
Case studies
10
Statistics
7
Biography
6
Handbooks, manuals, etc
5
Conference papers and proceedings
3
Early works to 1800
2
Interviews
2
Problems, exercises, etc
2
Autobiographies
1
Cases
1
Cross-cultural studies
1
Dictionaries
1
Encyclopedias
1
Handbooks and manuals
1
Juvenile literature
1
Methodology
1
Money
1
Silver coins
1
Study guides
1
Sumerians
1