1. Grosch's law repealed;Datamatwn,1962
2. com.atypon.pdfplus.internal.model.plusxml.impl.AuthorGroup@38d7903c
ANDERSON PHILIP N AND HYTER DELANO R "A method of bflhng third generation computer users " National Aeronautics and Space Admimstratlon TN D-7515 Dec 1973.
3. Economics of time-shared computing systems;(In two parts) Datamatzon,1967
4. Market changes in the computer services industry;Bell J Economics and Ma~agement Science,1973