DELAWARE WATER GAP
Historic Resource Study
Slateford Farm
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Appendix 23
Standard Sizes for Roofing Slate
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23. Standard Sizes for Roofing Slate
Lesley, et al., Geology of Lehigh and Northampton, p. 142.
(click on image for a PDF version)
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dewa/slateford_farm/app23.htm
Last Updated: 31-Dec-2009
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