Table schema:
CREATE TABLE table_name_15 (totals_06_10 INTEGER, pubs_2010 VARCHAR, totals_07_11 VARCHAR)

Question: 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