Onwumere Joseph, Eluwa Chiwendu - ISBN: 978-620-2-08235-8
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V. Joshi Manohar, P. Sujatha, K. Venkata Ramana - ISBN: 978-620-2-08150-4
Abd-Allah Hyder - ISBN: 978-3-659-90970-2
Robert Mangana - ISBN: 978-620-2-07132-1
Aleyda Coronado Márquez, Juan Bosco Hernández Zaragoza, Teresa López Lara - ISBN: 978-620-2-06311-1
Gideon E. D. Omuta - ISBN: 978-620-2-02313-9
John Angoh - ISBN: 978-620-2-08246-4