Revision history for entry de Laguna, Theodore (1922). "Point, line, and surface, as sets of solids" [DELPLA]

NB: for privacy reasons, few details are provided in public revision histories.
TimeTypeNotes
2016-06-30T10:21:14updateSystem / admin update -
2015-09-15T10:29:25updateSystem / admin update -
2015-02-02T17:06:57updateSystem / admin update -