Quantos selos têm um valor nominal de 37 cêntimos e foram impressos na Banknote Corporation of America?
CREATE TABLE table_15635768_1 (no_stamps_in_sheet VARCHAR, face_value VARCHAR, printer VARCHAR)
SELECT COUNT(no_stamps_in_sheet) FROM table_15635768_1 WHERE face_value = "37¢" AND printer = "Banknote Corporation of America"