Szymanski, Andrzej,  1934- <br/><br/>
Hardness estimation of minerals, rocks and ceramic materials / 
Andrzej Szymanski, Janusz mikolaj Szymanski. 
 - Amsterdam :  Elsevier North-Holland,  1989. 
 - 330 p, :  ill. ;  25 cm. 
<br/><br/>Bibliography : p. 315-328. 
<br/><br/><label>ISBN: </label>044498898x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hardness--Testing.<br/>Mineralogy.<br/>Rocks--Testing.<br/>Ceramic material--Testing.