1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19. Perchloric acid.
20.
21.
22.
Copyright (C)
NGS
|
NGS's Urban Exploration Old sewage plant, Poland |
|
|
Winter 2021 |
1. | 2. |
|
3. |
4. |
|
5. |
||
6. | 7. |
|
8. |
9. |
|
|
10. | 11. |
|
12. | 13. |
|
14. |
||
15. |
16. |
|
|
17. |
18. |
|
19. Perchloric acid. |
20. |
|
21. |
22. |
|
|
Copyright (C)
NGS
|
||