[PJ] Paper with something written on it? Yes [and I know I should have added a tiny bit of M I N E R A L to the definition but I thought it might mislead, and also guessed that 'paper' would be arrived at fairly quickly]
[Tuj] A specific piece of paper? Don't know what you mean by 'specific' so I can't answer that.
[Raak] A single piece of paper? Yes, definitely

[Lib] Laser Display Board? :) No
[I Say, Porter!] Chamberlain's bit of paper? No

[IS,P!] "Now wash your hands"? No
[Phil] A voting card? No
[Inkspot] A map? No
[Uncle Korks] Monetary implications? No

A particular piece of paper being something specific like the Magna Carta, I would interpret a single peice of paper as something more general like a calender. just so I don't go too far off track

[Raak] In a museum? No. [for clarification: when I replied 'yes' to a 'single piece of paper' I meant that only one sheet of paper was involved, as opposed to a pamphlet, magazine or book]
[Kim] Historical significance? Yes

ah ...simul
[Inkspot] A particular piece of paper? Well, it's 'particular' in that it's a suitable subject for AVMA - but if you're asking if it's the one-and-only of its kind - then NO

[IS,P!] 20th Century? Would you kindly frame your question in a more precise manner m'dear?
[Uncle Korky] Musicalimplications? No

[Projoy] Famous Printed Text? No

Hello [Phil] "artistic"? Well, YES, there is a pictorial representation of something.