BICYCLE TECHNOLOGY S. S. Wilson Scientific American Vol. 228, No. 3 (March 1973)

 https://www.jstor.org/stable/24923004

Shogun Selectra

 

Steel lugged

 

Restoring Vintage Bicycles from the Hand Built Era

 https://restoringvintagebicycles.com/

Cinelli frames

 https://cinelli.it/en/

Rivendell Bicycle Works