According to the Internet source given below, The Weavers were an American folk music quartet based out of the Greenwich Village area in New York City. They sang traditional folk songs from around the world, as well as blues, gospel music, children's songs, labor songs, and American ballads, and sold millions of records at the height of their popularity. Their style inspired the commercial "folk boom" that followed them in the 1950s and 1960s.
The Weavers were formed in November 1948 by Ronnie Gilbert, Lee Hays, Fred Hellerman and Pete Seeger. Due to the McCarthy era they disbanded in 1952 but reformed in 1955. Seeger resigned from the group in 1958 and was replaced by Darling.
The group disbanded in 1964.

Websites:
	The Weavers	Biography by wikipedia.org.