Classification
THA - Mechanical engineering - general
TAA - Engineering sciences - reference books
11
TEA - Electrical engineering - general
5
THD - Design and construction in mechanical engineering
3
AMA - Education - general
2
THH - Machines
2
THJ - Machining
2
MAK - Mathematics - formulae, tables
1
TIA - Industrial engineering - general
1
TIE - Process engineering
1