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| 0001564590-20-029902-index.html | 2020-06-19 13:10:33 | |
| 0001564590-20-029902.txt | 2020-06-19 13:10:33 | |
| glt-11k_20191231.htm | 188487 | 2020-06-19 13:10:33 |
| glt-ex231_6.htm | 2788 | 2020-06-19 13:10:33 |