TY  - BOOK
AU  - Essien,Udo Ekanem
TI  - Contrastive analysis: principles and further considerations 
PY  - 1978///
CY  - Ann Arbor, Mich.
PB  - University Microfilms International
KW  - Contrastive linguistics
N1  - Thesis (Ph.D.) - Georgetown University, 1978
ER  -