 The embryonic cell lineage of the nematode Caenorhabditis elegans

Paywalled of course at: www.sciencedirect.com/science/article/abs/pii/0012160683902014?via%3Dihub

Presumably John's 2002 Nobel Prize in Physiology and Medicine paper.

Hobert Lab just uploaded a print and that's it: www.hobertlab.org/wp-content/uploads/2013/03/Sulston_embryonic_lineage_1983.pdf. Hero.

Monumental 55 page beast, presumably the culmination of many years of work.