Principles of economics. /
Principles of microeconomics. /
Principles of macroeconomics. /
Principles of microbiology /
Principles and practice of dermatology /
Principles of Geodynamics.
Principles of marketing.
Principles and parameters : an introduction to syntactic theory /
Accounting principles /
Principles of economics /
Principles of accounting : advanced /
Principles of Electroplating and Electroforming. Electrotyping.
Principles of Engineering Geology /
The Principles of Physical Metallurgy
Physical Metallurgy Principles
Principles of Electronics in Medical Research.
Principles of pulse code modulation /
Principles of total quality /
Principles of knitting. Volume 1 /