Very interesting to see what you're doing Sue. Always been interested in the fashions side meself!
Pete Smith, (a very knowledgeable, helpful and likeable chap ), on here is probably someone who might help fill you in with a some of the info. you're after.
If you can get his assistance make sure he regales you with the tail of his long leather coat (they were all the fashion mid 70's) - it's bloody hilarious
Good luck with your project!