DIAGRAM SHEWING RELATIVE VALUE or BEAMS or LIGHT FALLING on an OPPOSITE WALL or. FLOOR.
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https://paperspast.natlib.govt.nz/periodicals/P19171201.2.18.4
Bibliographic details
Progress, Volume XIII, Issue 4, 1 December 1917, Page 89
Word Count
15DIAGRAM SHEWING RELATIVE VALUE or BEAMS or LIGHT FALLING on an OPPOSITE WALL or. FLOOR. Progress, Volume XIII, Issue 4, 1 December 1917, Page 89
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