اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Marr, J. E. (John Edward), 1857-1933
Title: The Principles of Stratigraphical Geology
Language: English
LoC Class: QE: Science: Geology
Subject: Geology, Stratigraphic
Release Date: Oct 16, 2013
Copyright Status: Public domain in the USA.
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