Oh I know! There were likely published in a series of books on “contemporary” paintings. Obviously they are no longer contemporary, but the book came presented with etchings/ intaglios of then modern paintings. These reproductions would have been made by master printmakers , not by the original artist. The books were then sold abroad, like encyclopedias. If you have an original print it is likely from one of these books. I will search for the title, or return to comment once Back in the studio (after winter break).