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.

There is a matching child’s smock.

Yarn weight and yardage are not specified.

Pattern is to be found on pages 71-73.