college outline series Differential equations / Kaj L. Nielsen Vector and tensor analysis / by Homer Vincent Craig columbia college natural science series Matter, energy and radiation / by J.R. Dunning and H.C. Paxton Simplified Russian grammar / Mischa H. Fayer, Aron Pressman, Anastasia Feodorovna Pressman american mathmatical series College algebra / H.L. Rietz; A.R. Crathorne Principles of radar / by members of the staff of the Radar School Massachusetts Institute of Technology Mechanics / by J.P. den Hartog