Principles of scientific research
Freedman, Paul
Principles of scientific research - Washington, D. C.: Public Affairs Press, 1950 - xi, 222p.
Research and philosophy
Economy of effort Mental approach Planning of research
D 001.8 / J0
Principles of scientific research - Washington, D. C.: Public Affairs Press, 1950 - xi, 222p.
Research and philosophy
Economy of effort Mental approach Planning of research
D 001.8 / J0