Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2 :
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2 : "Hydromechanics" to "Ichnography" [electronic resource] /
Various
- Project Gutenberg, 2012
- Project Gutenberg 40370 .
Public domain in the USA.
Electronic text
Public domain in the USA.
Electronic text