... Illumination and visual range under water
By: by R. Ruedy.
Contributors: National Research Council Canada.
Published: 1942
Place of publication: Ottawa
Language: eng
Number of pages: 32
Subjects: Ocean.; Light -- Transmission.
Notes: "References": leaves 27-32.
Cover-title.
At head of title : National Research Council of Canada.
Reproduced from type-written copy.
"N. R. C. no. 1061."