Gruhn, Ruth, author
Pacatello, 1961
Buku Teks
edited by Frances Farmer
Oceana, 1956
Buku Teks
Link, Arthur S., author
University of Pennsylvania Press , 1957
Buku Teks
Wanchope, R.S., author
Calcutta General Print, 1933
Buku Teks
Fahma Wijayanti, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2001
UI - Tesis (Membership)