Intellectual Property Rights

The authors of grant permission for the browsing of material they have contributed to this website’s pages.

They also grant permission to electronically copy and to print in hard copy portions one copy only of any page of this material for personal purposes only.

Material published on this website must not be shared outside this site without the permission of the respective copyright holder.

The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by international and Ethiopian law.