Congress, Radiation Research, 1966; Amsterdam: North Holland 
Publ. Co., 1967, pp. 700-713. 
Ponnamperuma, C. and N. Gabel 
1968 Current status of chemical studies on the origin of life. Space Life 
Sci. 1: 64-96. 
Ponnamperuma, C. and P. Kirk 
1964 Synthesis of deoxyadenosine under simulated primitive earth con- 
ditions. Nature 203: 400-401. 
Ponnamperuma, C., R.M. Lemmon, R. Mariner, and M. Calvin 
1963 Formation of adenine by electron irradiation of methane, am- 
monia, and water. Proc. Natl. Acad. Sci. 49(5): 737-740. 
Ponnamperuma, C. and R. Mack 
1965 Nucleotide synthesis under possible primitive earth conditions. 
Science 148; 1221-1223. 
Ponnampuruma, C., R. Mariner, and C. Sagan 
1963 Formation of adenosine by ultra-violet irradiation of a solution of 
adenine and ribose. Nature 198: 1199-1200. 
Ponnamperuma, C., C. Sagan, and R. Mariner 
1963 Synthesis of adenosine triphosphate under possible primitive earth 
conditions. Nature 199; 222-226. 
Ponnampuruma, C., R.S. Young, E.F. Munoz, and B.K. McCaw 
1964 Guanine—formation during the thermal polymerization of amino 
acids. Science 143: 1449-1450. 
Poole, J.H.J. 
1941. The evolution of the atmosphere. Roy. Dublin Soc. Sci., Proc. 
22(36): 345-365. 
1951 The evolution of the earth’s atmosphere. Roy. Dublin Soc. Sct., 
Proc. 25(16): 201-224. 
1971  Stromatolite biostratigraphy in the Late Precambrian. Quart. 
Notes, Geol. Surv. S. Australia 38: 3-11. 
1972 Proterozoic stromatolites — succession, correlations and prob- 
lems. Univ. Adelaide, Centre Precambrian Res., Spec. Paper 1: 
53-62. 
1973 Paleoecological interpretations of South Australian Precambrian 
stromatolites. Jour. Geol. Soc. Australia 19(4): 501-532. 
1974. The systematics of South Australian Precambrian and Cambrian 
stromatolites, Part II]. Roy. Soc. S. Australia, Trans. 98: 185-201. 
1976 The biostratigraphic potential of Precambrian stromatolites. /nt. 
Geol. Coner., 25th Sess., Sydney, Abstracts 1: 36. 
1976 Proterozoic stromatolites from the Nabberu and Officer Basins, 
Western Australia, and their biostratigraphic significance. Geol. 
Surv. S. Austral. Rept. Investigations 47: 51 pp. 
Pringle, J.W.S. 
1954 The evolution of living matter. New Biology 16: 54-67. 
Pruvost, P. 
1951. L’Infracambrien. Bull. Soc. Belge Geol. Paleont. Hydrol. 40(1): 
43-63. 
Popov, P. 
1967 Die Palaomykologie, ihre Stellung, Bedeutung und Moglichkeiten 
bei der Erforschung der organischen Welt des Prakambriums. Ber. 
Deutsch. Ges. Geol. Wiss., A, Geol. Paldont. 12(6): 720. 
139 
