This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Flight steps PSFdeutsch. Treppenlauf Flightsteps PSF UTC Flightsteps PSF Pearson Scott Foresman derivative work Overdose talk Begriffe vom englischen ins deutsche bersetzt Overdose Flightsteps PSF PDScottForesman Original upload log This image is derivative work of the following images File Flightsteps PSF with PDScottForesman