Метеорски кратер — разлика између измена

* {{Cite book |ref= harv|title=Guidebook to the Geology of Meteor Crater, Arizona |last=Shoemaker |first=Eugene M. |coauthors=and Susan W. Kieffer |year=1979 |publisher=Center for Meteorite Studies, Arizona State University |location=Tempe, Arizona |page=45| ref = harv}}