How do you use daggers and double daggers in a cross reference?

Hi,
I am researching daggers, double daggers, section marks and all the other symbols that are used with them and came accross this site below, so I though I'd ask how a "footnote" is different than a "reference mark"?
(Merriam-Webster's Collegiate Dictionary gives the definition of a reference mark as: a convention mark (as *, =86, or =87) placed in written or printed text to direct the reader's attention esp. to a footnote)
http://www.brl.org/formats/rule05.html

(1) Nonalphabetical signs as footnote and reference marks. When used as footnote and reference marks, the print signs below must be transcribed according to .
In this other site I came accross
(http://www.answers.com/topic/double-dagger), it says that a dagger is "a character used in printing to indicate a cross reference or footnote."
My dictionary says that a crosss reference is a notation or direction at one place (such as a book or filing system) to pertinent information at another place.
So I have to ask How are these symbols used in a cross reference? Do you put the symbols along with page numbers and then on the pages with those numbers, the same symbols next to the information? I always thought that the daggers, section marks (that symbol that looks like two S's superimposed) were archaic and rarely used footnotes, but last week, when I was browsing through a book in Barnes & Noble, I saw that the author used regular modern footnotes on one page, and the old-fashioned daggers, section marks et cetera on another page.

I coincidentally came accross this site below (don't ask) a few hours ago, so I thought I'd ask if they used the dagger and double dagger correctly?
http://www.notam02.no/~hcholm/altlang/ht/Macedonian.1.html#so0