JQK Spencer, Herbert (1820 - 1903)
JQKD/U A system of synthetic philosophy
JQKE/V First principles
JQKF/W The principles of biology
JQKG/X The principles of psychology
JQKH/Y Principles of ethics

© UB Siegen / Dr. A. vom Heede (2011-07-06 Simone Niederfranke)