TY  - BOOK
AU  - Ernst W. Puttkammer.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 226686655
SN  - 2
PY  - 1953///.;c.195346
CY  - Chicago
PB  - The University of Chicago Press
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
N1  - 5
ER  -