Permanence and durability of the books - V1   : spot testing for unstable modern book and record papers 

 - Richmond, Virginia  : W.J. Barrow Research Laboratory,  1969 
 - 28p.  : ill.  ; 24cm. 
 - (permanence/durability of the books); 6 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research report<br/>Testing
<br/><br/><label>LC Class. No.: </label>Z247.B3 No.6