1970    
Choose from any of the following publication months
to research publications of 1970.

Special Features and Authors for this year.....

  Insulator Types
     by Greg Kareofelas

  The Californias
           by Marvin Collins

The Surge Insulator
by Dick Augustyn

Top Tie Communication Insulator
Greg Kareofelas

The Handy Dandy (Amateur) Insulator Collector's Collecting Kit
by Sue Curtis Ducro

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