Reactor Types＆By ALVIN M．WEINBERG 1
Neutron Thermalization＆By M．S．NELKIN 20
Deep Penetration of Radiation＆By U．FANO and M．J．BERGER 43
The Theory of Resonance Absorption＆By L．W．NORDHEIM 58
Mathematical Problems of Nuclear Reactor Theory＆By EUGENE P．WIGNER 89
Diffusion Approximation to the Transport Equation＆By J．ERNEST WILKINS，Jr 105
Positivity and Criticality＆By GARRETT BIRKHOFF 116
Existence Theorems and Spectral Theory for the Multigroup Diffusion Model＆By G．J．HABETLER and M．A．MARTINO 127
Transport Theory and Spectral Problems＆By G．MILTON WING 140
One-Dimensional Multigroup Calculations：Estimation of Group Constants＆By R．EHRLICH 151
Numerical Methods for Solving Multi-Dimensional Multigroup Diffusion Equations＆By RICHARD S．VARGA 164
Monte Carlo Methods＆By R．D．RICHTMYER 190
Transport Theory and Invariant Imbedding＆By RICHARD BELLMAN and ROBERT KALABA 206
Numerical Solution of Neutron Transport Problems＆By BENGT CARLSON 219
Problems of Reactor Kinetics＆By HARRY SOODAK 233
Core Kinetics＆By H．L．GARABEDIAN 256
Temperature Coefficients and Stability＆By HARVEY BROOKS 289
System Kinetics＆By T．A．WELTON 309
Rearrangement Inequalities and Non-Linear Stability Criteria＆By W．K．ERGEN 327