PORTLAND
Pears Shilling Cyclopedia · 1898 · p. 81
Cement is so called from its resemblance in * colour ’ to Portland stone.
Bu kavram başka kaynaklarda da geçiyor
A Vocabulary of Criminal Slang (1915)
Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
Nuttall Encyclopedia (1907)
Modern English Biography (1892)
Nuttall's Standard Dictionary of the English Language (1890)
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
Zell's Condensed Dictionary (1879)
Portland-stone
—
Nuttall's Standard Dictionary of the English Language (1890)
PORTLAND STONE
—
A Dictionary of Arts, Manufactures and Mines (1840)
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