ISO-8253-1 Complete Document History
Acoustics - Audiometric test methods - Part 1: Pure-tone air and bone conduction audiometry

Complete Current Edition:
   2ND EDITION - PART 1: PURE-TONE AIR & BONE CONDUCTION AUDIOMETRY, ACOUSTIC - Nov. 1, 2010

Obsolete Revision Information:
   1989 EDITION - PART 1: BASIC PURE TONE AIR & - Nov. 15, 1989