An interesting map can be found HERE.: two detailed Palestine maps from 1947 and 1951 are superimposed and you can slide from one to the other. The later map has the armistice lines marking out the West Bank and Gaza strip.
For further pictorial presentations on the situation of Palestinians check out Visualising Palestine whose website is HERE. Maps from the 1940s (produced under the British mandate) have been put online and can be accessed HERE.