From the website:
The Gypsy Vest Accessory Book III by Jack Frost (the yarn people), Vol. 77, 1970

ONE SIZE FITS ALL

GAUGE: 5-1/2 stitches to 2 inches.

MATERIALS: 2--4 oz pull skeins 3 different colors--Jack Frost Wintuk Knitting Worsted type (use yarn double)

OR

8--4 oz pull skeins Jack Frost Wintuk Bulky (use single)

“K” crochet hook

NOTE: Keep in mind that a poncho has 4 points (front & back) and 2 shoulder points. You are working from the TOP down.