The instructions are in French but the shape is basic and there is a chart with the measurements in cm. So you can easily make your own using only the chart as a base for you own poncho.
You’ll we need about 1800gr of the bulky yarn, but less if you decide to change the type of yarn and the needles.
The cowl is finished by a row of crochet.

I added a cowl: a rectangle, (53cmx20cm) in garter stitch with 2 buttonholes.

I wrote the instructions on my knit sketchbook, the printed magazine was probably wasted. And I probably rewrite a few the pattern as I didn’t wrote all and added my improvements and suggestions.