Inventors who revolutionised our lives/
Gopalkrishnan, K.V.
Inventors who revolutionised our lives/ K.V. Gopalkrishnan - 2nd ed. - New Delhi: National Book Trust, 2008. - 198 p. ; 21 cm. - (Popular Science) .
978-81-237-4766-7
/ GOP/I
Inventors who revolutionised our lives/ K.V. Gopalkrishnan - 2nd ed. - New Delhi: National Book Trust, 2008. - 198 p. ; 21 cm. - (Popular Science) .
978-81-237-4766-7
/ GOP/I