Annotated bibliography of Lower Paleozoic sponges of North America / [by] J. Keith Rigby -- and Matthew H. Nitecki --.

v.18:no.1(1968)

The sponges / by Robert von Lendenfeld.

v.42 (1915) text

New Archaeoscyphia (Porifera) from the Ordovician of Anticosti Island, Quebec / J. Keith Rigby -- and Matthew H. Nitecki --.

v.33:no.1(1973)

Bibliographic index of North American archaeocyathids / [by] Matthew H. Nitecki --

v.17:no.2(1967)