A Complete Map of Los Angeles Area and Guide to Olympic Games - published by the Union Oil Company - Designed and Illustrated by Mary Hall Atwood - Copyright 1932
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Found via the Vintage Road Maps
Folks should really click-through on this one then select Actions>View all sizes to see the fabulous detail that was put into this map. I especially like how the side and bottom panels cover areas that were usually left out of Los Angeles maps in this era.