Pisa, Noleen, Riaan Rossouw, and Wilma Viviers. 2015. “Industrial Cluster Formation As A Strategy To Diversify A Sub-National Economy: Illustrations From South Africas North West Province”. International Business & Economics Research Journal (IBER) 14 (4):623-54. https://doi.org/10.19030/iber.v14i4.9354.