In a message dated 3/14/10 9:11:03 PM, [email protected] writes:
> On Mar 14, 2010, at 9:07 PM, [email protected] wrote: > > > A good mark must be durable in itself and not easy to remove either > accidentally or wilfully. > > Why do you say that? > > I was rreading about cadastral maps and it seemed like such an obvious necessity even of art marks.
