lostlivedead: May 7-9, 1968, The Electric Circus, 23 St. Mark's Place, New York, NY: The Grateful Dead

deadsources: May 4-9, 1968: New York

deadessays: 1968 Show List

hooterollin: Grateful Dead Performance List January-June 1968

ad: New York Times, May 5, 1968, p. D6;