'Appropriate technologies' in the conservation of cultural property 

 - París :  UNESCO,  1981. 
 - 136 p. :  retrs. 
 - Protection of the cultural heritage. Handbooks for museums .
<br/><br/><label>ISBN: </label>9231019007 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>7.025 =20 APP No.7