TY  - BOOK
AU  - Helsdon, R. M.
TI  - Mechanical engineering science: : for g1,g2,t1,and t2 courses
U1  - 621 
PY  - 1968///
CY  - London
PB  - ; D.Van Nostrand
KW  - Engineering
KW  - Mechanical Engineering
ER  -