"New York State Routes 21" . "New York State Route 21#Realignments and truncations" . . . . "Route 21" . "County Route 23 (Allegany County, New York)" . . "New York State Route 21" . "NY-21" . "NY 21" . "New York State Route 21#Establishment" . "South" . "NY" . . . . "New York State Route 21" . . . "N.Y. Route 21" . . . . "NY 21" . "North" . "21" . . . . . . "Route 27 (Erie County, New York)" . . . . "New York State Route 21" . "County Route 22 (Putnam County, New York)" . "NY 72" . ":New York State Route 21#Establishment" . "State Route 21" . "160918.30656" . . . "County Route 21A (Warren County, New York)" . . . . . . . "21" .