Diffusions, Markov Processes, & Martingales by DAVID WILLIAMS

ÉLÉMENTS DE CALCUL TENSORIEL by A. LICHNEROWICZ

ELEMENTS OF THE TOPOLOGY OF PLANE SETS OF POINTS by M. H. A. NEWMAN,

DIE IDEE DER RIEMANNSCHEN FLACHE by E. WEYL

DIFFUSION PROBLEMS AND PARTIAL DIFFERENTIAL EQUATIONS By S. R. S. VARADHAN

TOPOLOGISCHE GRUPPEN I by L. S. PONTRJAGIN

Denumerable Markov Chains: with a chapter of Ma. Kemeny, Snell, Griffeath |

TOPOLOGISCHE GRUPPEN II by L. S. PONTRJAGIN