Interesting book 'Ekco Sounds'

[Yorkie]

Used to be, and I assume still is, that to get a copyright here you send two copies of the Library of Congress, but there are no further copies needed. I have the copyright on vol.1 of my series on 1920s radios, and the publisher did the applications for the remaining two volumes.

Whoooeee Alan, you certainly had to do your research to put those three splendid tomes together - well done on that!