00278    a2200097   4500020001500000082001800015245006400033260004000097300001500137650002800152  a0335142729  a004.0151bOPE  aChapter 3 algorithms and pseudocodebBlock I (Chapters 1-3)  aWaltonbOpen Universityc1988g1988  a53cmc29cm  aMathematical principles