Write SQL query to solve given problem: Among the states with a public school count of 20 and below, list their race.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT DISTINCT T2.race FROM state_sector_details AS T1 INNER JOIN state_sector_grads AS T2 ON T2.stateid = T1.stateid WHERE T1.schools_count <= 20 AND T1.control = 'Public'