ISBN-13: 9780824774974 / Angielski / Twarda / 1981 / 168 str.
ISBN-13: 9780824774974 / Angielski / Twarda / 1981 / 168 str.
This book provides the reader with the information they need to develop into a person who seeks creative opportunities and responds with elegant inventions. It is intended for young inventor and to all those who have the talent and the desire to invent.