GG: availability of recording of documentaries

[Daniel Vaiser <vaiser@airmail.net>]

This is my first message to the group so bear with me:

Are there any recordings or copies available of other  sound
documentaries (i.e. on Richard Strauss or Arnold Schoenberg) 
which are available commerically (besides that of the "Solitude
Trilogy") or do they only exist in the GG archives in a major library (I
cannot recall the library at this time . . .)?  

Best Wishes,
Daniel Vaiser