Global S&T Development Trend Analysis Platform of Resources and Environment
分面浏览：来源平台 |
| 当前检索式 | ((ALL：Standardized Precipitation Index)) |
| 限定条件 | 无 |
| world meteorological 4 | EurekAlert 2 | Science X network 2 |
| ANU Climate Change I 1 | Climate Central 1 | EurekAlert! - Earth 1 |
| Science Daily 1 | World Meteorological 1 | World Resources Inst 1 |
