Complex sentence: Stefan and Franciszka Themerson published many of their own works through their highly original Gaberbocchus Press from 1948 to 1979, most were designed by Franciszka, and many included her illustrations.
Split into simpler sentences: Stefan and Franciszka Themerson published many of their own works through their own Gaberbocchus Press from 1948 to 1979. Most were designed by Franciszka, and many included her illustrations.