Light and sound /
Nelkon, M. 1914
Light and sound / by M. Nelkon - 4th. ed (with S1 units) - London : Heinemann Educational Books Ltd, 1969 - 418 p. ; 22 cm.
0435686143
Light
Light and sound / by M. Nelkon - 4th. ed (with S1 units) - London : Heinemann Educational Books Ltd, 1969 - 418 p. ; 22 cm.
0435686143
Light
