TY  - BOOK
AU  - Den Hartog, J. P.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1956///.46
CY  - New York
PB  - McGraw-Hill Book Company, Inc.
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
N1  - 5
ER  -