From the pattern:

To make the vertical colored stripes in this blouse, the body and the sleeves are knit in vertical rows. Then, to further emphasize the stripes, the stockinette stitch work is turned wrong side out.

The specifics of this pattern are provided with schematics, with general written instructions.

The body is worked in one sideways piece (front and back together) with a hole left for the neck. The sleeves are knit separately.

There is a matching adult smock

Yarn weight and yardage are not specified.

Pattern is to be found on pages 71-73.