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Heel, A. C. S. van (Abraham Cornelis Sebastinī¸ ), 1899-1966.
What is light? [By] A. C. S. van Heel and C. H. F. Velzel. Translated from the Dutch by J. L. J. Rosenfeld.
Optics
1968.
Velzel, C. H. F., joint author.
Catalog