J.O. Bird

• Electrical and electronic principles 2 checkbook
• Electrical Science Three Checkbook
• Engineering Mathematics and Science Three Checkbook
• Mathematical formulae
• Mathematics Four Checkbook
• Newnes physical science pocket book
• Physical Science 1 Checkbook
• Electrical Principles 3 Checkbook
• Engineering Mathematics
• Engineering science 3 checkbook
• Higher Electrical Technology
• Mathematics 1