TY  - BOOK
AU  - Weaver H। G।
AU  - Weaver H। G।
TI  - The Mainspring Of Human Progress
U1  - 301।297/WEA 
PB  - "The Foundation For Econo। Educa।, New York।"
KW  - Weaver H। G।
KW  - The Mainspring Of Human Progress
ER  -