User

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?

Navigate

Resources

Donations


You can help support this site by making a small donation using either a PayPal account:

or with a major credit card such as:

 

 

Click here for details.

Google Ads

Author Topic: M-S progressive difficulty history  (Read 655 times)

StanleyVera

  • Newbie
  • *
  • Posts: 1
    • Email
M-S progressive difficulty history
« on: January 11, 2013, 11:28:37 PM »
Hi there. Who can tell me when Monday through Saturday progressive difficulty first began? Was it already in existence in the 60's? I'm doing research for a novel and haven't been able to find an answer online. Thanks for your help!

 

Powered by EzPortal