What the positive and negative results of Spanish Exploration in California.
http://en.wikipedia.org/wiki/History_of_California_to_1899#European_exploration_.281530.E2.80.931765.29
http://wiki.answers.com/Q/What_were_some_effects_of_spanish_exploration_of_the_Americas
http://teacher.scholastic.com/researchtools/researchstarters/missions/