Nelkon, Michael.
Light and sound. - 2d ed. - London, Heinemann [1956] - 364 p. illus. 23 cm.
56035012
Light.
Sound.
QC355 / .N45 1956
Light and sound. - 2d ed. - London, Heinemann [1956] - 364 p. illus. 23 cm.
56035012
Light.
Sound.
QC355 / .N45 1956