A.P.J. Abdul Kalam Biography PDF
Abdul Kalam was born 15th October, 1931yr, Rameswaram, India and died 27th July 2015,,, Shillong…Indian scientist & politician,who played a …
Chemists
100 Influential Scientists PDF
Here 100 influential scientists are listed, with their inventions and biography…These scientists were changed the world…Read about them …