Kruxo and How to Use It, Kilborn Photo Paper Co. (Cedar Rapids, IA), undated c. 1908, ~4"x5 ½", 48pp
This is another small instructional book printed by a photo paper manufacturer. Kruxo was advertised mainly 1908-1910, so the best estimate of age of this catalog is c. 1908. A loose inserted flyer is shown at the end.
