Analysis of information sources in references of the Wikipedia article "Fossil" in English language version.
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: ISBN / Date incompatibility (help)[permanent dead link]a fossil consisting of a stony mass that entered a hollow natural object (such as a bivalve shell) in the form of mud or sediment, was consolidated, and remained as a cast after dissolution of the mold
a fossil consisting of a stony mass that entered a hollow natural object (such as a bivalve shell) in the form of mud or sediment, was consolidated, and remained as a cast after dissolution of the mold