Thermistor measuring
Let Vs be a low voltage precision bandgap reference voltage regulator.
Let R3 = 10K or whatever the room temperature spec for the thermistor is given.
Let R1=R2= precision resistors.  The instrument Amp configuration will need bipolar supplies or a reference level offset in the output stage.
Modern thermal sensors however are more accurate in one chip such as;
The INA330 offers excellent long-term stability, and very low 1/f noise throughout the life of the product. The low offset results in a 0.009°C temperature error from –40°C to +85°C. (not including sensor error)
There are many other low cost temp sensors in 1 chip that are accurate to 1 deg and much cheaper.