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| Subject |
|---|
| Hans Bethe [1] |
| Harry H. Love [1] |
| Herb Voelcker [1] |
| Higher Education [1] |
| History [4] |
| History and criticism [1] |
| Horticulture [1] |
| Howard E. Evans [2] |
| Howard Howland [1] |
| Hubble Space Telescope [1] |
| hydrology [1] |