Maintaining Connectivity in a Multi-Board PCB System | by Cadence PCB | Medium
Resistance | Multimeters | Adafruit Learning System
How to Choose the Right PCB Resistor | PCBA Store
PCB Quote - Engineering Technical - PCBway
A piece of PCB for paralleling two TO-3 transistors with 100 mΩ ballast resistors made of PCB traces and also there's room for a base emitter resistor, bought from a salvage store. :
Designers must follow guidelines for resistor aging - EDN