Ready References
Control Instrument Applications
Signal Conditioning and Data Acquisition Basics
Hands-On Astrophysics (HOA)
First Aid for Electrical Accidents
Introduction to Fossils
A Glossary of Seismic Terms
Relative Time Scale
Ready References 
Control Instrument Applications Signal Conditioning and Data Acquisition Basics Hands-On Astrophysics (HOA) 
First Aid for Electrical Accidents Introduction to Fossils A Glossary of Seismic Terms Relative Time Scale