The Lease Islands, formerly called the Uliassers, are a group of four inhabited islands (and smaller uninhabited islets), lying immediately to the south of Seram in the province of Maluku, in Indonesia. The largest and most westerly of the four is the island of Ambon, which constitutes an autonomous municipality (city or kota) within the province. The other three inhabited islands, from west to east, are Haruku, Saparua and tiny Nusa Laut, each of which constitutes an administrative district (kecamatan) within Central Maluku Regency.
Muller, Dr. Kal (1990). Spice Islands: The Moluccas. Periplus Editions. ISBN 0-945971-07-9.