Methods of measurement for radio transmitters - Part 4: Amplitude/frequency characteristics and non-linearity distortion in transmitters for radiotelephony and sound broadcasting Recommendation 244-4/A1 /  
 Recommendation 244-4/A1 
ISO, IEC. 
 - First edition. 
 - Geneva :   ISO :   IEC,   1973. 
 - 48 stron ;   30 cm.