[time-nuts] Improving the stability of crystal oscillators

[Tom Van Baak]

Maybe because it was written back in 1930's, but one of the better
discussions of quartz temperature control, including considerations
of insulation and isothermal layers (attenuation and conduction)
are in the patents for the old double oven General Radio frequency
standard:

http://www.leapsecond.com/museum/gr676b-50kc/
http://www.leapsecond.com/museum/gr676b-50kc/US1967185.pdf

/tvb