Engineering Design: A Practical Guide
URI
https://books.google.co.ke/books?hl=en&lr=&id=3YhMmcAuFDAC&oi=fnd&pg=PR2&dq=madara+ogot&ots=OlSzkYLgW6&sig=ZXggrat1DT7MLBmmsQ7nvQ02Loo&redir_esc=y#v=onepage&q=madara%20ogot&f=falsehttp://hdl.handle.net/11295/86478