Stuck with last three of fifty. No letters or number of letters.Famous, popular or topical in the 60's,
'Psalms of David'
'Cerulean safe'
'Not just for the corps de ballet'
I'm sure some clever person will work them out immediately!
Thanks for the answer. I thought cerulean was something to do with sky or blue but did not know about Peter being a safe. Apparently its from 'The Sweeney'. That leaves two!