000 00257nam a2200073 4500
080 _a
_b
245 _aBS-1991 (Part 5) - 1961; Recommendations for letter symbols, signs and abbreviations Part 5 Applied Thermodynamics
700 _aBritish Standards Institution
260 _aLondon
_bBSI
_c1961
300 _a30p
999 _c24704
_d24704