That was an article for Flight Journal magazine some years ago.
A good book on the subject is "Silent Wings" by Gerard Devlin.
There are numerous others but the titles escape me for the moment.
I also had fantastic help from the US' Silent Wings Museum in Texas and the Glider Regiment Association in the UK. Both were working on a glider exchange type of deal - getting a CG-4A to the UK and a Horsa to the US.