War inventions and how they were invented; an interestingly written description of the many appliances and weapons used in war, and how they work, told in simple language by Charles R. Gibson ... with 17 illustrations & diagrams. (Science for children [v.4])
War inventions and how they were invented; an interestingly written description of the many appliances and weapons used in war, and how they work, told in simple language by Charles R. Gibson ... with 17 illustrations & diagrams.