SUBJECT
Biography
Scientists
Science
12
History
8
Juvenile literature
3
National Academy of Science and Technology (Philippines)
2
Philippines
2
Renaissance
2
Social aspects
2
Societies, etc
2
Study and teaching
2
Technology
2
Astronomers
1
Biology
1
Case studies
1
Dictionaries
1
Directories
1
Engineers
1
Experiments
1
Galilei, Galileo
1
Gamblers
1
Gambling
1
Inventors
1
Methodology
1
Philosophy
1
Sources
1