Étó ónká onípele ogoogún lédé Yorúbá
Subtitle: the Yorúbá vigesimal number system
By: Olú Lóńgé .
Publisher: BookBuilders Editions Africa
Published: 2009
Place of publication: Ibadan, Nigerian
Language: yor; eng
Number of pages: 129
ISBN-13: 9789788088851; 9789788808868