How Do You Measure Time?
"Simple text and color photographs describe the units and tools used to measure time--in both English and Spanish"--
Libros de Thomas K. Adamson (2 libros)
Submarinos de La Armada de Ee.Uu./U.S. Navy Submarines
Provides an overview of the design, uses, weapons, and equipment of U.S. Navy submarines. Written in English and Spanish.