Here is the reference I found:

South, Stanley

 1978a Contemporary Patterns of Material Culture or Hansel and Gretel
in the Modern World: Following the Trail of Pull Tabs to "The Pause
that Refreshes". The Conference on Historic Site Archaeology Papers
1977  12:87-106.

I think I have a copy of the typology in the binder given out by Dr.
Stanley Olsen at the University of Arizona for his historical
archaeology class. I'll check.
-- 
Anita Cohen-Williams
Listowner of HISTARCH, SUB-ARCH, & SPANBORD
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