Numbers from one to ten (1-10) in over 5000 languages, among them a lot of African languages (classed by language family). Under "sources", the author gives an account of his very extensive literature sources. [editors ilissAfrica]
Personal website of the linguist Idiatov. You will find several of his papers and presentations online, as well as a fulltext of his PhD on "A typology of non-selective interrogative pronominals". His focus is on the Tura language (Ivory Coast), for which there is also an onlne dictionary. Further foci are Bamanankan, nominalisation, interrogative pro-nominals and pro-verbs, morphology, grammaticalisation, numerals. ... [editors ilissAfrica]