05:43
Phylogeny_Tutorial_1
05:47
Dr. Gary Introduces the Primary, Secondary, and…
Dr. Gary Introduces the Primary, Secondary, and Tertiary Sectors of Economic Activity
Dr. Gary introduces the concept of sectors of economic activity as part of the discussion for Lesson 6 (Economic Activities) in GEO 151v, Human Geography. Primary, secondary, and tertiary sectors…
02:09
Base 10
By: Dr. Ashton Shortridge; For GEO425: Week 1, Class 2.