| 其他書名 | Hearings at Los Angeles, September 19-20, 1963 on the Subject of Employment of Older Workers, Vocational Training and Youth Opportunities; Effectiveness of State and Federal Legislation, Ventilation of Heaters in School Classrooms |
| 出版 | 1963 |
| URL | http://books.google.com.hk/books?id=7YhNAQAAMAAJ&hl=&source=gbs_api |