Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_39 ( bronze INTEGER, total VARCHAR, silver VARCHAR, nation VARCHAR )

### Question ###
What is the total sum of bronze medals for the Soviet Union when there are more than 0 silver medals and more than 3 total medals?

### Accurate SQL ###

SELECT SUM(bronze) FROM table_name_39 WHERE silver > 0 AND nation = "soviet union" AND total > 3