00550nam a2200169Ia 4500003000900000008004100009040001600050080001500066110004000081245009100121250001200212260005000224300001400274650004100288650002700329650002400356IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a519.6bNPL  aIndia. National Physical Laboratory 0aModern computing methodscNational Physical Laboratory                                  a2nd ed.  aLondonbHer Majesty's Stationary Officec1961  avi, 169p.  aAstronomy and astrophysics thesaurus  aDifferential equations  aIntergral equations