[78-L] archiving and/or storing 78s

[Malcolm]

A few years back, when 78-L was more vital than it is today, an 
institutional poster or two mentioned the ideal temperature and relative 
humidity ranges for storage and /or archiving of 78s. If I remember 
correctly it was ~55% humidity and ~72 F degrees temperature. Can these 
figures be corroborated? Have studies been done since, and by whom? A 
relevant website would be a plus!
Thanks,
Malcolm R