Businesses stuck with carbon paper because this company's 1949 Model A was slow, messy & hard to use
The NBER paper, by economist Xavier Sala-i-Martin and his... [DOC] [TLE] A Century of Advertising Education - American Academy of Advertising [PAR] Frank Coolsen, a business student at the UNIVERSITY OF ILLINOIS, writes his 
Master's ...... came the model against which other advertising programs were.