"Unto this last": four essays on the first principles of political economy.

Mode of access: Internet.

Principles of human geography,

Published 1920.

Principles of political economy, and of population: including an examination of Mr. Malthus's essay on those subjects,

Mode of access: Internet.

The principles of money.

Mode of access: Internet.

Principles of secondary education ; a text-book.

Mode of access: Internet.

The principles of teaching, based on psychology,

Mode of access: Internet.

Principles of economics,

Mode of access: Internet.

Principles of psychology /

Includes index.

Some leading principles of political economy newly expounded [electronic resource] /

Reproduction of original from Harvard Law School Library.

Principles of politi

Mode of access: Internet.

Principles of rural economics

Mode of access: Internet.

Principles of chemistry; an introductory textbook of inorganic, organic, and physiological chemistry for nurses and students of home economics and applied chemistry, with laboratory experiments,

Mode of access: Internet.

The principles of projective geometry applied to the straight line and conic,

Mode of access: Internet.

The first principles of evolution,

"Literature": p. 321-328.

Principles of human physiology.

Mode of access: Internet.