| 其他書名 | Although Encouraging Contractors to Use Recycled Materials in Its Highway Projects, Caltrans Collects Scant Data on Its Recycling and Solid Waste Diversion Efforts |
| 出版 | California State Auditor, Bureau of State Audits, 2006 |
| URL | http://books.google.com.hk/books?id=zaVJAQAAMAAJ&hl=&source=gbs_api |