2008 Notes No. 1 Argentina 1935-51 Definitives: Papers, Watermarks, Proofs, and Errors
2008 Notes No. 6 Argentina 1935-51 Definitives: 'Servicio Oficial’ Issues
2008 Notes No. 8 Argentina 1935-51 Definitives: Regular Issues 1951 onwards
2009 Book Argentina 1935-51 Definitives: 1E1 and 1E2 papers, including the Departmental Officials and 'Servicio Oficial.'
SRE From Scratch
HVAC Handbook Commissioning Guideline
Cornell Landscaping Study Part 1
C3 product design
CAD NOTES
2 Op Amp Concepts
Draft Slides(1)
Delta chamber of commerce Transit Improvements for Insutrial Areas