LINE OF SIGHT:
LINES OF INSIGHT:
Wilkinson, F.J., Monkhouse, H. R. (1967). Maps and Diagrams; Their Compilation and Construction [Paperback], Methuen & Co Ltd. Intervisibility, Line of sight. p. 125 [scanned].
(Book purchased in Mevagissey, Cornwall, Hurley Books July 2010)
Fractal drum. Lines of INsight: http://classes.yale.edu/fractals/panorama/ManuFractals/FractalDrums/FractalDrums.html
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