This is almost identical to "Arusha for an African Holiday". This copy is undated, and its hard to see if it's earlier or later, so I have estimated the same date - 1936.
The cover says "Ngorongoro: The Game Filled Crater", but the title page is "Arusha for an African Holiday", and all the page headings say "Arusha for an African Holiday"
The photos are all different and the itineraries are also different.