Concise practical physics :
Tripathi, Dr. S.P.
Concise practical physics : Class ix. - New Delhi : Selina publishers, 1995. - 64 p. ill. 24 cm.
530 TRI.
Concise practical physics : Class ix. - New Delhi : Selina publishers, 1995. - 64 p. ill. 24 cm.
530 TRI.