Around the clock /
Smith, Victor Clyde, 1902-
Around the clock / [by] Victor C. Smith [and] Katherine Clarke in consultation with W.R. Teeters. - 1 volume (unpaged) - Science for modern living ; 3 . - Science for modern living ; 3. .
Timekeeper (general) USA Juvenile timekeeping Teeters, W.R.
Around the clock / [by] Victor C. Smith [and] Katherine Clarke in consultation with W.R. Teeters. - 1 volume (unpaged) - Science for modern living ; 3 . - Science for modern living ; 3. .
Timekeeper (general) USA Juvenile timekeeping Teeters, W.R.