Wikipedia also has a list of his works (here) that contains links to images. According to the entry, there are 34 paintings currently considered actual Vermeer works. The Frick Collection has three of these. Other "large" Vermeer collections are: Rijksmuseum, Amsterdam (4); Metropolitan Museum of Art, New York (4); National Gallery, Washington, D.C. (3); and Mauritshuis, The Hague (3). So the Frick punches far above its weight in this regard.
I visited the Frick Collection in September, the first time there in many years. Here are its Vermeers.
The Frick web page for this painting is here.
Frick page for this one is here.
Frick information here.
Even though this is considered a genuine Vermeer, I have trouble believing it. That's because of the treatment of the people is not as polished as in other Vermeer paintings. Yes, the setting is typical with a window at the left and a map as background. And surely the paints and canvas were tested and found to be mid-17th century. If this is indeed by Vermeer, then I wonder if he was experimenting with a slightly different style of painting people, or perhaps the painting is unfinished.