Boring, Edwin G.,

Sensation and

D. Appleton-Century, New York, 1941.

Boyle, Robert,

Experiments and Considerations Touching Colours,

printed for Henry Herringman, London, 1670.

Bragg, Sir William,

The Universe of Light,

Macmillan Co., New York, 1934.

Brewster, Sir David,

Shafi da ba'a sani ba