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More history and addition information can be read in the main [[GBD]] article. | More history and addition information can be read in the main [[GBD]] article. | ||
'''Note:'''Information on specific GBD shapes may be found here on Pipedia at [[GBD Shapes/Numbers]] or in it's original | '''Note:'''Information on specific GBD shapes may be found here on Pipedia at [[GBD Shapes/Numbers]] or in it's original form at: http://www.perardua.net/pipes/GBDshape.html | ||
=== Notes on the listings === | === Notes on the listings === | ||
*The first list below is of GBD firsts, i.e. stamped GBD. | *The first list below is of GBD firsts, i.e. stamped GBD. |