House Dangerous: Indoor Pollution in Your Home and Office - and What You Can Do about It! by Ellen J. Greenfield
WPT PUBLICATIONS HAS MET THAT NEED by providing the most up-to-date study materials available: THE GENERAL RADIOTELEPHONE OPERATOR'S LICENSE STUDY GUIDE, by Thomas LeBlanc has been used by several thousand technicians & students, during the past three years. Over forty technical schools, numerous avionics shops, & several military training centers; have adopted this book for their FCC License preparation & avionics classes. The Study Guide also includes an audio cassette ("Study Guide Companion Tape"). Some important topics include: Marine & Aviation Regulations - Emission Types - AC & DC Circuits - Transformers - Semiconductors - Power Supplies - AM & FM Receivers - Transmitters - Antennas & Transmission Lines - UHF & Above - Motors & Generators - Measurements - Digital Circuitry - Troubleshooting - Radar Fundamentals. There is no longer a Commercial First Class or Second Class Radiotelephone License. These have been replaced by one license called THE GENERAL RADIOTELEPHONE OPERATOR'S LICENSE. This new license requires the knowledge of updated electronic theory & additional marine & aviation rules & regulations.