00448nam a2200181Ia 4500 CD26 Ritt, Joseph Fels Differential algebra Providence American Mathematical Society n.d. One CD American Mathematical Society Colloquium Publications v. 33 AMS Webpage 0 0 0 0 ISI ISI 2003-01-09 0 CD26 CD26 2019-02-14 00:00:00 2019-02-14 CD 23043 23043 23043