CREATE TABLE table_name_15 (totals_06_10 INTEGER, pubs_2010 VARCHAR(255), totals_07_11 VARCHAR(255))
What is the lowest 06-10 totals with a pubs 2010 of 68 and a 07-11 totals larger than 305?
    
SQL: SELECT MIN(totals_06_10) FROM table_name_15 WHERE pubs_2010 = 68 AND totals_07_11 > 305