Time for clocks /
Trivett, Daphne Harwood.
Trivett, John.
Maestro, Giulio.
New York Crowell
c1979
Provides instructions for several easy-to-make clocks that demonstrate the concept of time
Provides instructions for several easy-to-make clocks that demonstrate the concept of time
Time
Clocks and watches
Time.
Clocks and watches.