Where was The Americanization of Emily filmed?

1964 film by Arthur Hiller

The Americanization of Emily (1964) was filmed in London, Oxnard and Borehamwood, 3 places named in its German Wikipedia’s Hintergrund section, in the United Kingdom, the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data