00353nam a2200121Ia 4500082002000000100003800020245004000058260003500098300001700133490004700150500000500197700002900202  a515.35bB445.DD  aBellman, Richard and Cooke, K. L.  aDifferential-difference equationsb  aNew YorkbAcademic Pressc1963  axviii, 462p.  aMathematics in Science and Engineeringv 6  a  aCooke, K. L. ; jt. auth.