Table: flyers_1970_71
Columns: round
player
position
nationality
college_junior_club_team_league

Question: Which Round is the lowest one that has a College/Junior/Club Team (League) of oshawa generals (oha), and a Player of bob kelly?
SQL: SELECT MIN("round") FROM flyers_1970_71 WHERE "college_junior_club_team_league" = 'oshawa generals (oha)' AND "player" = 'bob kelly'