Torch of civilization; the story of man's conquest of darkness,

Mode of access: Internet

Visual illusions, their causes, characteristics and applications,

"References": p. 246-247.Mode of access: Internet

Color and its applications,

"References" at end of chapters.Mode of access: Internet

Ultraviolet radiation; its properties, production, measurement, and applications,

Second printing."References" at end of each chapter.Mode of access: Internet