CREATE TABLE table_name_29 (visitor VARCHAR, record VARCHAR)
SELECT visitor FROM table_name_29 WHERE record = "30–19–9"
ใครคือทีมเยือนในเกมเมื่อชาวแคนาดามีสถิติ 30–19–9?
Who was the visiting team at the game when the Canadiens had a record of 30–19–9?