Inventors and Inventions Smithmark Publishers, 1992 - 64 sivua Discusses the accomplishments of men and women who have given us important inventions in such areas as industry and commerce, weapons and warfare, and communication. |
Inventors and InventionsSmithmark Publishers, 1992 - 64 sivua Discusses the accomplishments of men and women who have given us important inventions in such areas as industry and commerce, weapons and warfare, and communication. |