CREATE TABLE table_19662 ("Year" FLOAT, "Mens singles" TEXT, "Womens singles" TEXT, "Mens doubles" TEXT, "Womens doubles" TEXT, "Mixed doubles" TEXT)

Name the womens singles for raina tzvetkova petya nedelcheva
SELECT "Womens singles" FROM table_19662 WHERE "Womens doubles" = 'Raina Tzvetkova Petya Nedelcheva'
SELECT "Womens singles" FROM "table_19662" WHERE "Womens doubles" = 'Raina Tzvetkova Petya Nedelcheva'