James Mark Baldwin, Dictionary of Philosophy and Psychology, Bd. 1, London 1901

»The relation between two or more relatively independent things or systems of change which advance, hinder, limit, or otherwise affect one another«

@book{Baldwin.1901,
 year = {1901},
 title = {Dictionary of Philosophy and Psychology, Bd. 1},
 address = {London},
 publisher = {Macmillan},
 editor = {Baldwin, James Mark}
}