Ilmu alam rěndah Longman.
Lewis, Gerwyn Elidor David.
Chong, Seck-Chim.
Kuala Lumpur :  Longman, 
1970.
Accompanied by: Buku kěrja untok darjah 5 / by G.E.D. Lewis and Chong Seck Chim (40 p.)