00454    a2200121   450000500170000024500630001726000490008030000330012970000170016294200130017999900150019295201250020720250607101925.0  aOxford  Junior  Encyclopaedia  : Volume IV  Communications  aLondon, bOxford  University  Press, c1961.  a496p.: Ill.: figures.c25cm.  aSALT, L.  E.  2ddccBKS  c3408d3408  r2025-06-07 10:22:14l0p00000011458v60000.00w2025-06-07yBKS102ddc407000aCBEMLbCBEMLcREFd1959-06-18g20000.00