I20, I24, I28, O12
I20, I25, D80, 015
I20, I21, I23, I26
I20, I29, C93, D91
A22, C93, I20, I23, J08, J16
: General / O31 Innovation and Invention: Processes and Incentives / O32 - Management of Technological Innovation and R&D
I20, I21
J13 Early childhood stimulation; other codes: I20, I25, I30, I38
I20; I31
I20