1. Correction [to "The reactance-tube oscillator," ibid., Nov 1949, pp 1330-1332]
2. Now You're Talking! All You Need to Get Your First Ham Radio License;See;ARRL},2000
3. Annual Report of the Commissioner of Navigation to the Secretary of Commerce and Labor for the Fiscal Year Ended;from Commissioner Eugene Tyler Chamberlain to Secretary Charles Nagel),1912