Freedman, Paul
Principles of scientific research / Paul Freedman - London : Macdonald & Co., 1949. - 222p. diagrs. 23 cm.
Research
Science : Research
500.72
Principles of scientific research / Paul Freedman - London : Macdonald & Co., 1949. - 222p. diagrs. 23 cm.
Research
Science : Research
500.72