00317nam a2200121 a 450000500170000008200170001710000170003424500450005126000380009630000220013449000200015670000190017620251203091609.0  a613,bD, bij  aBijlani, RL.  aHuman machine: how to prevent breakdowns  aINew DelhiiabNational Bookc1990  axii, 235p, 22 cm.  aPopular science  aManchanda, SK.