National Environmental
| Data
| Reference Service
| National Environmental | |
| textile | 环境政策法规案 |
| data | |
| avia. | 诸元; 信息; 特性; 已知数; 论据 |
| desert. | 资料; 数据 |
| dril. | 数据采集和技术分析系统 |
| math. | 数字; 事实 |
| reference service | |
| environ. | 资料服务 |
| libr. | 咨询服务 |
| |||
| 1970环境政策法规案1970美 | |||
|
National Environmental : 105 phrases in 21 subjects |