Principles of Extractive Metallurgy - Volume 1.

Principles of dynamics /

Principles of refrigeration /

Principles of Psychotherapy /

Principles of Pyrometallurgy /

Principles of auditing. /

Principles of frequency Modulation.

Principles of Modern Physics /

Principles of Engineering Geology /

Chemical principles /

Telecommunications principles /

Principles of biogeography /

The principles of mathematics /

Accounting principles /

Principles of biochemistry /

Principles of Geodynamics.

Principles of microbiology /

Principles of Photochemistry /

Principles of Polarography /

Principles of Radiochemistry /

Principles of Zoophysiology : volume 1.