TY  - BOOK
T1  - The supply of concepts /
DA  - 1989.
CY  - New York :
AU  - Silverman, Irving,
CN  - BD241
CN  - BD241
PB  - Praeger,
PP  - New York :
PY  - 1989.
ID  - 146947
KW  - Methodology.
KW  - System theory.
SN  - 0275932753 (alk. paper) :
TI  - The supply of concepts /
ER  -