Lefor Openo

In a nutshell: In 1950, Marie-Claire Lefort and Marie-Francine Oppeneau met in Paris. They studied together for 3 years, to become art professors at Paul Colin School where they met other famous poster designers. Their careers took off when they won the first prize in a poster contest. Their artwork basically covered the 1960's in advertising, political posters and more. Read in more specific details here. Their artwork is worth looking at. I enjoyed some of their posters, such as the one above. However, I am not certain, if their site covers their entire art work.

Lefor-Openo
http://lefor.openo.free.fr/