Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman: All Time Mets Left Handed Pitcher (Part Two-1973-1978)
Heroes of '69: Jerry Koosman Lived For The Big Games - Metsmerized Online
1978 topps jerry koosman Values - MAVIN
Jerry Koosman's No. 36 to Be Retired By Mets in June – NBC New York
Heroes of '69: Jerry Koosman Lived For The Big Games - Metsmerized Online
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman: All Time Mets Left Handed Pitcher (Part One: 1967-1972)
Jerry Koosman: All Time Mets Left Handed Pitcher (Part Two-1973-1978)
Jerry Koosman's No 36 to be retired by Mets in June
NY Mets to retire Jerry Koosman's number next season, Jeff Wilpon says
Jerry Koosman – Society for American Baseball Research