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1974 Carbon content and carbonate C'* abundances in the Early Pre- 
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Nagy, B. and L.A. Nagy 
1968 Investigations of the early Precambrian Onverwacht sedimentary 
rocks in South Africa. Geochemistry 14; 209-215. 
1969 Early Precambrian Onverwacht microstructures: Possibly the old- 
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Nagy, B., L.A. Nagy, Sister M.C. Bitz, and C.G. Engel 
1968  Alga-like forms in the Precambrian Onverwacht sedimentary 
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Nagy, B., L.A. Nagy, J.E. Zumberge, D.S. Sklarew, and P. Anderson 
1976 Biological evolutionary trends and related aspects of carbon 
chemistry during the Precambrian between 3,800 m.y. and 2,300 
m.y. Int. Geol. Congr., 25th Sess., Sydney, Abstracts 1: 33-34. 
Nagy, B., J. Zumberg, and L. Nagy 
1975 Abiotic, graphitic microstructures in micaceous metaquartzite 
about 3760 millions years old from Southwestern Greenland: Im- 
plications for early Precambrian microfossils. Proc. Natl. Acad. 
Sci. 72(3): 1206-1209 
Nagy, L.A. 
1971 Ellipsoidal microstructures of narrow size range in the oldest 
known sediments on earty. Grana 11: 91-94 
1974 Transvaal stromatolite: First evidence for the diversification of 
cells about 2.2 x 10° years ago. Science 183; 514-516 
1975 Comparative micropaleontology of a Transvaal stromatolite (~ 2.3 
x 10° y. old) and a Witwatersrand carbon seam (~ 2.6.x 10° y. old). 
Geol. Soc. Amer., Abstr. 7(7): 1209-1210 
Nagy, L.A. and B. Nagy 
1973 Stromalites from the Transvaal Sequence: Life forms 2.2 x 10° 
years old? Amer. Assoc. Stratigraphic Palynologists, Proc. 4th 
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Nagy, L.A., J. Zumberg, and B. Nagy 
1973. Early Precambrian life: Problems and significance (Abstract). 
Prog. Int. Conference Origin Life, Barcelona, Spain, Sess. 43 
Paper 65 
Nagy, L.A. and J.E. Zumberge 
1976 Fossil microorganisms from the approximately 2800 to 2500 mill- 
ion years old Bulawayan stromatolite: application of ultramic- 
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1969 Stratigrafiya berezovskoi i nyuiskoi vpadin (in Russian). (Stratig- 
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