1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
Patent
1936
1937
1938
by Mohamed, Othman, Mokhtar, Halimatun Halaliah, Baba, Maznah, Wan Jaafar, Wan Marzuki
Published 2008
Published 2008
Book
1939
1940