SUBJECT
Balances (Weighing instruments)
1
Chemistry
1
Chemistry, Physical and theoretical
2
Chemistry, Physical and theoritical
1
Electric engineering
1
Electronic books
3
Electronics
1
Equilibrium
1
Experiments
5
Geometrical optics
1
Handbooks, manuals, etc
3
Incandescent lamp
1
Laboratory experiments
1
Laboratory manuals
7
Mathematics
1
Mechanical engineering
1
Physical sciences
1
Physics
Problems, exercises, etc
4
Sports
1
Study and teaching
3
Study and teaching (Secondary)
1
Textbooks
3
Thermodynamics
2
dictionaries
1