Analysis of information sources in references of the Wikipedia article "Lonely hearts killer" in English language version.
Long before there was a craigslist or dot-com dating, there were places where men and women who were too shy or busy to meet face to face could find romance. Calling themselves "matrimonial bureaus," these organizations were known mostly as the "lonely hearts clubs," and they flourished through the middle of the 20th century. [...] (The article is a side-bar to a story about Philip Markoff, a "Craigslist killer" and it describes the murders committed in 1931 by Harry F. Powers, the so-called "Matromonial Bureau Murderer," also known as "The West Virginia Bluebeard" and "The Butcher of Clarksburg.")
{{cite web}}: CS1 maint: archived copy as title (link) Boulder Jane Doe (This article covers a possible Colorado victim of Harvey Glatman, California’s “Lonely Hearts Killer.”){{cite web}}: CS1 maint: archived copy as title (link) Boulder Jane Doe (This article covers a possible Colorado victim of Harvey Glatman, California’s “Lonely Hearts Killer.”)