Gènere
Electronic books
152
Handbooks, manuals, etc
22
Bibliography
4
Congresses
4
Digests
4
Periodicals
4
Case studies
3
Statistics
3
Cases
2
Directories
2
Catalogs
1
Classification
1
Collections
1
Forms
1
Interviews
1
Longitudinal studies
1
Online resources
1
Outlines, syllabi, etc
1
Rules and practice
1