What are some good resources for learning more about the PDI, its meaning and how it's measured? Also, how does one apply this information? Lastly, what about

What are some good resources for learning more about the PDI, its meaning and how it's measured? Also, how does one apply this information? Lastly, what about international teams? I have colleagues from different parts of the world - how would this apply in a meeting where some are USAnians, some Canadians, some German and some Eastern a European. Lastly, the US is huge. SoCal is probably different from Missouri from Cambridge, MA. Would love to hear your take on this.