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A treatise on light / by R. A. Houstoun ... with 328 diagrams.
- 535 H8439
- Houstoun, Robert Alexander, b. 1883.
- Longmans, Green and Co.,
- 1915.
- London ; New York :
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Belgium, by R.C.K. Ensor.
- 949.3 E599
- Ensor, R. C. K. 1877-1958.
- Williams and Norgate;
- 1915.
- London :