1. Planktonic foraminifera from the OligoceneMiocene Cipero and Lengua formations of Trinidad, B. W. I;Bolli;U. S. Natl. Museum Bull.,1957
2. Observations on the stratigraphic distribution of some warm water planktonic foraminifera in the young Miocene to Recent;Bolli;Eclogae Geol. Helvet.,1964
3. Zonation of Cretaceous to Pliocene marine sediments based on planktonic foraminifera;Bolli;Venez. Geol. Min. Petrol., Bol. Int.,1966
4. Miocene radiolarian faunas from southern California;Campbell,1944
5. Biostratigrafia del Neogene mediterraneo basata sui foraminiferi planctonici;Cati;Boll. Soc. Geoi. Ital.,1968