What are the types of periodicals?

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Tags

1. #publication
2. #intervals
3. #appears
4. #predictable
5. #trade
6. #journals
7. #short
8. #items
9. #professional
10. #magazines
11. #scholarly
12. #regular
13. #periodical
14. #newspapers
15. #newsletters
16. #include
17. #types
18. #industry