British Standard  Fire Tests on Building Materials and Structures 
British Standards Institution 
 -  British Standards Institution  April 1990 
 - 36p.  ill.  30cm 
 - BS 476 : Part 20 : 1980 Part 20:Method for Determination of The Fire Resistance of Elements of Construction (General Principles) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Buildings--Fire and Fires Prevention--Standards<br/>Fires Prevention--British Standard