TY  - BOOK
AU  - Phelan,Glen
AU  - Hanneman, Kristin (Design Manager )
AU  - Shymansky, James (Consultant )
TI  - Defining the Laws of Motion
T2  - National Geographic - Reading Expeditions - Scientists in Their Times
SN  - 079228898X
U1  - 920 21
PY  - 2003///
CY  - Washington
PB  - National Geographic Society
KW  - Biography
KW  - تراجم
N1  - Famous People; Gift from National Geographic
ER  -