Middle school boy sampling and testing water in New York City. One boy is holding a water sample beside a saltwater nitrate colour chart | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Stern, Oona |
Bildgröße: | 3264 px × 4928 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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