Classification
ACA - Languages, dictionaries - general
1
ACE - Germanic languages, Indo-Germanic languages
1
CNH - Electrochemistry - reference books
1
HDE - Neurology - general aspects
1
HDS - Neurophysiology, neuroanatomy
1
LGR - Animal physiology
1
LKD - Biochemistry - comprehensive works
1
TBC - Electronic circuits
1
THA - Mechanical engineering - general
1