00450nam a2200157Ia 4500003000900000008004100009040001600050080001700066100001800083245006900101250001200170260004800182300001400230650002100244650002700265IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a517.584bWAT  aWatson, G. N. 2aA treatise on the theory of Bessel functionscG. N. Watson        a2nd ed.  aCambridgebCambridge University Pressc1944  avi, 804p.  aBessel functions  aDifferential equations