| web | https://e360.yale.edu/features/fracking-gas-chemicals-health-pennsylvania |
| author | Jon Hurdle |
| publication | Yale Environment 360 |
| date | 2017-11-01 |
| web | Cassandra J. Clark, Nicholaus ... | Environ Health Perspect | 2022-08-17 | |
| web | Longxiang Li, Francesca Domini... | Nat Energy | 2022-02-01 |
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