archive.org/web/20161024214918/http://www.panoramio.com/user/1322186?with_photo_id=75763595 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161029211711/http://www.panoramio.com/user/5038562?with_photo_id=93572737 operator: Panoramio described at URL: https://web.archive...
Dünkelberg quarry in Witten (Germany) German Eingang des Nachtigallstollens im Steinbruch Dünkelberg (Muttental), Witten object of statement has role: photographer...
archive.org/web/20161031164414/http://www.panoramio.com/user/596286?with_photo_id=124897521 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161021161303/http://www.panoramio.com/user/596286?with_photo_id=62764686 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028055819/http://www.panoramio.com/photo/91836329...
panoramio.com/user/440234?with_photo_id=8392025 operator: Panoramio described at URL: https://web.archive.org/web/20161009233713/http://www.panoramio...
archive.org/web/20161102093558/http://www.panoramio.com/user/596286?with_photo_id=113429709 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161029081205/http://www.panoramio.com/user/596286?with_photo_id=100977537 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161026223122/http://www.panoramio.com/user/596286?with_photo_id=85698509 operator: Panoramio described at URL: https://web.archive...
.jpg){kind=link}
.jpg){kind=link}
_Zeche_Nachtigall_-_panoramio.jpg){kind=link}
_in_Darmsheim_-_panoramio.jpg){kind=link}
