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Type of RNLE literature (sorted by number of documents in descending order)
| Type | Number | Percentage (%) |
|---|---|---|
| Journal articles | 96 | 70.1 |
| Conference proceeding papers | 23 | 16.8 |
| Government documents* | 9 | 6.6 |
| Book chapters | 5 | 3.6 |
| Trade magazines | 2 | 1.5 |
| Guideline document | 1 | 0.7 |
| Journal letter | 1 | 0.7 |
|
| ||
| Total | 137 | 100.0 |
: All documents are published by NIOSH except one by the Health and Safety Executive, United Kingdom
