01001nam a2200289 i 450099100106849970753620020507110043.0970308s1970 us ||| | eng b10169118-39ule_instLE00641593ExLDip.to Fisicaita53(022)53.1.553.1.32QC39Open University34998Mass, length and time :forces, fields and energy /Open UniversityBletchley, Buckinghamshire :Open University Press,19702 v. in 1 :ill. ;30 cm.Science Foundation Course ;3-4Physical measurements.b1016911817-02-1727-06-02991001068499707536LE006 53(022+076) OPE12006000002844le006-E0.00-l- 00000.i1020630927-06-02Mass, length and time188386UNISALENTOle00601-01-97ma -engus 01