Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page N'Dama:

"

The age of first calving is 3.5 years in Upper Casamance and is slightly lower in Lower and Middle Casamance. The calving interval is 16 to 17 months in Middle and Upper Casamance and roughly 19 months in Lower Casamance with 80% of calving taking place in the last six months of the year. The abortion rate is 10 to 20%, which leaves an average calving rate of 56%. Calves are weaned around 12 months and castration, when it occurs, is around three years. Annual mortality rate is 12% overall, with 30% for calves under one year, 15% for one to two-year-olds, 5% for two to three-year-olds, and 2% for adults.[1]