Ad. Hoc Groups / Phase I & II / Documents TRANS/WP.30/1999/6 (English only) 4. session (21 - 24 June 1999) English TRANS/WP.30/1999/5 (English & Russian only) 4. session (21 - 24 June 1999) English Russian TRANS/WP.30/1998/16 3. session (19 and 20 October 1998) English French Russian
