Here are entered works on active discrimination against, or aversion to, homosexuals. Works on prejudicial attitudes or assumptions held by heterosexuals concerning homosexuals or homosexuality as well as works on the presumption that everyone is heterosexual and that heterosexuality is the only normal sexual orientation are entered under Heterosexism.
Here are entered theoretical works on the phenomenon of gravitation, i.e. the attraction between masses anywhere in the universe, and on determinations of the constant of gravitation. Works relating to measurement of the resultant effect of the gravitational attraction and centrifugal repulsion between any body and a planet or other celestial body, including works on earth's gravity are entered under the heading Gravity.