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windmill

The Boy Who Harnessed the Wind

By Bryan Mealer

Tuulimyllyt Lappajärvellä energianlähteenä

By Antti Savola

An Account of the Operations Carried Out for Accomplishing a Trigonometrical ...

By William Mudge,Isaac Dalby,Thomas Colby ,Ordnance Survey

O. A. C. Review Volume 46 Issue 6, March 1934

By Ontario Agricultural College