00421nam a2200157Ia 4500003000900000008004100009040001600050080001600066100001800082245006100100250001200161260002800173300001600201650002700217650001900244IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a517.91bBOO  aBoole, George 2aA treatise on differential equationscBoole George        a5th ed.  aNew YorkbChelseac1898  axxiv, 735p.  aDifferential Equations  aNASA Thesaurus