00377nam a22001337a 450000500170000000800410001702000150005805000200007310000150009324500420010825000080015026000580015830000270021620260520122619.0260520b        |||||||| |||| 00| 0 eng d  a0247128929  aQC21.2.N45 1977  aNelkon, M.  aPrinciples of physics /cby M. Nelkon  a7th  aLagosbCSS Bookshops and Hart-Davis Educationalc1977  axiii, 680p. :illsbHbk