Classification
CAA - Chemistry - reference books
6
ACA - Languages, dictionaries - general
3
ACE - Germanic languages, Indo-Germanic languages
3
AZZ - Firm index - general
1
LHL - Microbiology - general aspects
1
LOL - Genetics - general aspects, classic genetics
1
LRD - Cytology - comprehensive works
1
LRH - Cytology - methods
1
LTA - Biotechnology - reference books
1
LTH - Biotechnology - methods
1
LTX - Bioeconomy
1