00491nam a2200181Ia 4500003000900000008004100009020002200050040001600072080001800088100001700106245008000123260002600203300001500229650002300244650002100267650001200288650000900300IN-BaIIA211028s9999    xx            000 0 eng d  a978-93-81300-36-7  cIIA Library  a5(091)bBER-3  aBernal, J. D 0aScience in historybvol. 3, the natuaral sciences in our timecJ. D. Bernal  aBhopalbEklavyac1969  a703-1003p.  aBiological science  aPhysical Science  aScience  aTime