Additional examples are adjusted to the entries in an automated way - we cannot guarantee that they are correct.
The basic unit of reference is the paragraph, not the page, chapter or section.
The length of each measurement interferometer is given in units of reference length by the ratio of measurement interferometer to reference interferometer fringes.
Our primary units of reference are 'societies', that is, distinct and relatively autonomous communities whose members' mutual social relations are embedded in, and expressed through, the medium of a common culture.