The Utah State University (USU) houses a vast collection of Outdoor Recreation Catalogues and magazines, You can browse and search records of more than 8,000 catalogues and magazines from over 500 companies, including manufacturers like Lowe Alpine and Sierra Designs to retailers like Eastern Mountain Sports and REI.
He designed stamps from around 1955 and in the book Karl Oskar Blase, Briefmarken-Design, Verlag für Philatelistische Literatur, 1981, he was described as one of the most influential stamp designers in Germany.
