Cretaceous
Explanation of Terms Used in Entomology · 1906 · p. 1
: chalky white: the third, uppermost and latest of the three great divisions of the mesozoic or secondary rocks.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
The American Dictionary and Cyclopedia (1910)
The American Dictionary and Cyclopedia (1909)
Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
Chamber's Twientieth Century Dictionary (1908)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
Chandler's Encyclopedia (1898)
Chamber's Etymological of the English Language (1895)
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
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