Citations:double vertical line

The symbol .
 * 1948, Max Kenneth Horwitt, Investigations of Human Requirements for B-complex Vitamins, page 29:
 * The double vertical line indicates time at which yeast extract was added to the daily regimen.
 * 1992, F. Sánchez, M. Collados, R. Rebolo, Observational and Physical Cosmology, page 126:
 * This gives what is currently the most stringent lower limit to 77 in the framework of BBNS, shown by the left-most tall vertical line and the leftmost shorter double vertical line in fig. 1 for homogeneous and inhomogeneous models respectively.
 * 1993, Balasubramaniam Srinivasan, Unix Document Processing and Typesetting, page 161:
 * A double vertical line can be drawn by specifying double vertical bars (‖).
 * 1997, Nikolaus Harnoncourt, Reinhard G. Pauly, The Musical Dialogue: Thoughts on Monteverdi, Bach, and Mozart, page 113:
 * Thus the double vertical line of Geminiani is related to the thick vertical line of Mozart.
 * 1998, Burkhard Dretzke, Modern British and American English Prononunciation: A Basic Textbook, page 89:
 * The whole tone unit stands between a double vertical line (double bars) ||.
 * 1998, Ann Hutchinson Guest, Choreographics: A Comparison Of Dance Notation Systems From The Fifteenth Century to the Present, page 133:
 * In the sequence of Ex. 127a the position for the right arm preceding the double vertical line is a starting position.
 * 2007, K. David Harrison, When Languages Die:The Extinction of the World's Languages and the Erosion of Human Knowledge, page 39:
 * The ǁGana people (800 speakers—the double vertical line denotes a click sound) of Botswana have no generic word for living things, nor do they recognize a plant versus animal distinction.
 * 2011, Michael S. Driscoll, J. Michael Joncas, The Order of Mass Study Edition and Workbook, page 15
 * The double vertical lines signify logical places to alternate between choir/cantor and congregation.