help! i have to type up a 2 1/2 page outline on 'Tap Code' in the vietnam war, but there arent many sources...

Question

i don't know how to begin, and i can't find any sources with enough info for 2 1/2 minimum full pages. here's what i have so far:

TAP CODE
Who- 4 POWs
What- secret communication code used by prisoners or the air force
When- created in June 1965
Where- Hoa Lo (aka, Honoi Hilton) Vietnam
Why- they expected they’d be separated, so they devised a code so they could keep in touch
How- based on a 5 x 5 alphabet matrix. Each letter was communicated by tapping two numbers: the horizontal rows would be tapped first, and then the vertical columns succeeded them. An example for T would be 4,4. X was used to break up sentences and C was used instead of K as well as itself.

i honeslty do not know how to start writting notes out of this topic because 1. there aren't many reliable sources
2. there isn't that much info in the sources i have, and 3. i don't have a book on the topic at my disposal

because im at home and it's too late to go borrow a book from the library

Answer 1

http://www.bls.gov/cps/cps95vet.htm

Answer 2

You have the net goggle it...........