CREATE TABLE table_15635768_1 (no_stamps_in_sheet VARCHAR(255), face_value VARCHAR(255), printer VARCHAR(255))
How many stamps have a face value of 37¢ and were printed in the banknote corporation of america?
    
SQL: SELECT COUNT(no_stamps_in_sheet) FROM table_15635768_1 WHERE face_value = "37¢" AND printer = "Banknote Corporation of America"