00286nam a22000977a 450000500170000000800410001702000150005804000080007324500610008126000460014220200904105945.0200904b           ||||| |||| 00| 0 eng d  a0435670263  cCML  aPractical Assessement in Science: Physics.cJohnston, B.  aGreat BritainbAthennaeum Press Ltdc1989