Classification
ACE - Germanic languages, Indo-Germanic languages
2
TNJ - Nuclear reactor technology
2
ACA - Languages, dictionaries - general
1
CAA - Chemistry - reference books
1
CHJ - Molecular physics, molecular structure
1
DKAE - Windows
1
PJA - Atomic physics - general
1
THM - Heat transfer, mass transfer - technical aspects
1
YFD - Public service legislation
1