Oxford University Press - Online Resource Centres

Lipsey & Chrystal: Economics 12e

Chapter 10

AmosWeb Encyclonomic Web·pedia offers a fairly gentle overview of resource markets (once logged in, either select R from the top of the page, and then click on the resource markets link, or search for "resource markets").

Robert E Schenk's Cyber Economics site offers a detailed set of resources on Problems in Resource Markets, including a good explanation of Marginal Productivity and a useful exposition of Tournament theory (you'll need to work your way through several different pages).