| 其他書名 | Operating Two-way Radios Every Day and in Emergencies : Instructor's Guide |
| 出版 | Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Office of Mine Safety and Health Research, 2011 |
| URL | http://books.google.com.hk/books?id=eeIqtwAACAAJ&hl=&source=gbs_api |