BEER/ JOHNSTON, . (2001). VECTOR MECHANICS FOR ENGINEERS (STATICS). : TATA MC GRAW HILL.
BEER/ JOHNSTON, . 2001. VECTOR MECHANICS FOR ENGINEERS (STATICS). : TATA MC GRAW HILL.
BEER/ JOHNSTON, . VECTOR MECHANICS FOR ENGINEERS (STATICS). : TATA MC GRAW HILL. 2001.