| 其他書名 | Commercial Standard CS98-42, Effective Date for New Production from May 10, 1942. A Recorded Voluntary Standard of the Trade |
| 出版 | U.S. Government Printing Office, 1942 |
| URL | http://books.google.com.hk/books?id=Ajj5k83xRQ0C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |