00338nam a2200145 a 4500008004100000020001500041050001400056100001600070245002200086246001300108250001200121260003000133300002000163350000900183120416s1970    ||||||||||||||||| ||    u  a0719520436  aQC 23 Dun  aDuncan, Tom10aExploring physics  abook two  a2nd ed.  aLondonbJohn Murrayc1970  avi, 120p. : ill  a0.00