CREATE TABLE table_204_843 (id NUMBER, "volume" NUMBER, "year" CLOB, "names" CLOB, "articles" NUMBER, "pages" NUMBER, "images" NUMBER, "maps" NUMBER, "number of copies" NUMBER)

other than 1977 , what year had 53 maps ?
SELECT "year" FROM table_204_843 WHERE "year" <> 1977 AND "maps" = 53
SELECT "year" FROM "table_204_843" WHERE "maps" = 53 AND "year" <> 1977