Classification
ACE - Germanic languages, Indo-Germanic languages
3
ACA - Languages, dictionaries - general
2
TAA - Engineering sciences - reference books
2
DKAE - Windows
1
DTAE - MS - Access
1
LKH - Biochemistry - methods
1
LOH - Genetics - methods
1
LRH - Cytology - methods
1
PAD - Physics - comprehensive works
1
PEA - Electromagnetism
1