Properity and Durability of Slate. Stone; an Illustrated Magazine, 1900.
Properity and Durability of Slate [link]Paper  bibtex   
@article{noauthor_properity_1900,
	title = {Properity and {Durability} of {Slate}},
	volume = {21},
	url = {https://books.google.com/books?id=aHs5AQAAMAAJ&pg=PA254#v=onepage&q&f=false},
	journal = {Stone; an Illustrated Magazine},
	year = {1900}
}

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