ILC 1 expanded class yt

      yt    techniques 

yt	techniques, applied sciences  « ys v
yte	medicine  « yt8sh yt8mU(60)
yth	psychology  « y8p
yths	psychoanalysis
ytj	pedagogy  « yt8se
ytm	management, organizational sciences
ytu	agronomy  « yt8vm
ytw	engineering  « yt8vVw
yty	library and information science, documentation, LIS  « yt8sgl

or

Facets key
0  under aspect      
1  at time           
2  in place          
3  through process   
4  made of element   
5  with organ        
6  from origin       
7  to destination    
8  like pattern      
9  of kind