Charles Yerkow

1912

• Automobiles; how they work
• Fun and safety on two wheels
• Fundamentals of soft soldering
• Here is your hobby
• Judo Katas
• Modern judo
• Motorcycles: how they work
• Contest judo
• Getting the best out of your bicycle
• Here is your hobby: motorcycling
• Judo Katas
• Modern judo