first stub description of add_reference
first stub description of add_reference

mwatts15/PyOpenWorm,travs/PyOpenWorm,gsarma/PyOpenWorm,mwatts15/PyOpenWorm,openworm/PyOpenWorm,gsarma/PyOpenWorm,openworm/PyOpenWorm,hnunner/PyOpenWorm,kaustubhcs/PyOpenWorm