AS Level Photography Help?

[Rice]

So I'm doing Photography this year at AS level and we need to do artist research on two photogram artists. I'm doing Laszlo Moholy-Nagy and Man Ray. What I want to know is what type of thing I need to write for my research. We need to do two A3 pages on each artist, and I'm currently on about one for each artist. I'm finding it very dfficult to find much information on the artists themselves and theiri influences, so I was wondering if anyone knows how to bulk out my research a little more, without using too many pictures

Thanks!