SS-S-439 Complete Document History
Slabs, Roofing, Precast, Gypsum +Cancelled, 1967, Superseded By Ss-T-315


Obsolete Revision Information:
   NOT - SLABS, ROOFING, PRECAST, GYPSU - July 31, 1967
   BASE - SLABS, ROOFING, PRECAST, GYPSU - Jan. 1, 1960