Brotzen, F. 
1941 Nagr a bidrag till visingsOformationens stratigrafi och tektonik. 
Geologiska Foreningens i Stockholm Foérhandlingar 63(3): 245. 
Brummer, J.J. and E.L. Mann 
1961 Geology of the Seal Lake area, Labrador. Geol. Soc. Amer. Bull. 
72: 1361-1382. 
Bruns, E.P. 
1963 Istoriya razvitiya russkoi platformy v pozdnem dokembrii (in Rus- 
sian). In Stratigrafiva SSSR, Verknil dokembrii, Moscow, Gos- 
geoltekhizdat. 
Bruns, E.P., A.N. Heissler, N.S. Igolkina, and M.M. Tolstikhina 
1960 Late Precambrian and Cambrian deposits of the Russian platform 
in the USSR. Internatl. Geol. Congress, 21st Sess., Copenhagen, 
Rept. Soviet Geol., Prob. 8: 26-24. 
Bukatchuk, P.D. 
1972 The Vendian-Cambrian boundary in the relation to Cambrian 
stratigraphy of Moldavia (in Russian). Akad. Nauk Mold. SSSR, 
Inst. Geofiz. Geol. 
Burlingame, A.L., P. Haug, T. Belsky, and M. Calvin 
1965 Occurrence of biogenic steranes and pentacyclic triterpenes in an 
Eocene shale (52 million years) and in an early Precambrian shale 
(2.7 billion years): A preliminary report. Proc. Natl. Acad. Sci., 
U.S. 54(5): 1406-1412. 
Burmann, G. 
1966 Mikroreste aus der Lausitzer Grauwackenformation. Deutsch. 
Akad. Wissen., Monatschr. 8(3): 218-224. 
1969 Organische Mikrofossilien in prakambrischen Sedimenten Sach- 
sens und Thiringens. Deutsch. Akad. Wissen., Monatschr. 11(4): 
297-308. 
Butin, R.V. 
1959 Iskopaemye Cyanophyceae v Proterozoyskikh karbonatnykh ot- 
lozheniyakh yuzhnoy Karelii (in Russian). Akad. Nauk. SSSR, 
Karel. Kolskii Filial, Izv. 2: 47-51. 
1960  Organicheskie ostatki v proterozaiskikh otlozheniyakh Yuzhnoi 
Karelii (in Russian). Akad. Nauk SSSR, Karel. Filial, Tr. 26: 
152-157. 
1965 O nakhodke Carelozoon jatulicum v proterozoiskikh ot- 
lozheniyakh Karelii. In Vsesoyuznyi simpozium po paleontologii 
dokembriya i rannego kembriya. Tez. dokl. Novosibirsk, pp. 
53-54. 
1966 Iskopaemye vodorosli proterozoya Karelii (in Russian). In Ostatki 
Organizmov i Problematika Proterozoiskikh Obrazobanii Karelii, 
Petrozavodsk, pp. 34-64. 
Butin, R.V. and V.A. Sokolov 
1965  Vodoroslevye kompleksy proterozoya Karelli i ikh geologo- 
litologicheskoe znachenie. In Vsesoyuznyi simpozium po paleon- 
tologii dokembriya i rannego kembriya. Tez. dokl. Novosibirsk, 
pp. 52-53. 
Button, A. 
1971 Early Proterozoic algal stromatolites of the Pretoria Group, 
Transvaal Sequence. Trans. Geol. Soc. S. Africa 74: 201-210. 
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