Here:

https://ostarapublications.com/product/race-and-racial-differences/ (2022)

https://ostarapublications.com/product/the-biology-of-the-race-problem/ (1962)

https://ostarapublications.com/product/iq-and-race-the-complete-overview/ (2019)

https://ostarapublications.com/product/race/ (1974)