Rai, Bindhyachal creator Freedman, Herbert I. Choudhury, Deba Prosad text enk Oxford, U.K Alph Science International 2013 2 ed. monographic eng xi, 477 p. por B. Rai, D.P. Choudhury, H.I. Freedman. Ecuaciones diferenciales 515.352 R49 2013 9781842657720 107595 141208 20220329144159.0 000111133