PRIMARY PRODUCTION ISOTOPES EXTINCTIONS AND ATMOSPHERE

[91] Silverman S.R., 1964, ISOTOPIC COSMIC CHEM, P92

[92] SILVERMAN SR, 1958, AAPG BULL, V42, P998

[93] SIMPSON GEORGE GAYLORD, 1952, JOUR PALEONTOL, V26, P359

[94] SIMPSON JF, 1966, B GEOL SOC AM, V77, P197

[95] STEEMANNIELSEN E, 1959, GALATHEA REPRT COPEN, V1, P49

[96] STEEMANNNIELSEN E, 1955, DEEP SEA RES S, V3, P281

[97] Strickland J., 1960, B FISH RES BOARD CAN, V122, P1

[98] TAPPAN H, 1966, 101 GEOL SOC AM SPEC, P218

[99] TAPPAN H, 1966 GEOL SOC AM SPE

[100] TEICHERT C, 1964, PROBLEMS PALAEOCLIMA, P597

[91] Silverman S.R., 1964, ISOTOPIC COSMIC CHEM, P92

[92] SILVERMAN SR, 1958, AAPG BULL, V42, P998

[93] SIMPSON GEORGE GAYLORD, 1952, JOUR PALEONTOL, V26, P359

[94] SIMPSON JF, 1966, B GEOL SOC AM, V77, P197

[95] STEEMANNIELSEN E, 1959, GALATHEA REPRT COPEN, V1, P49

[96] STEEMANNNIELSEN E, 1955, DEEP SEA RES S, V3, P281

[97] Strickland J., 1960, B FISH RES BOARD CAN, V122, P1

[98] TAPPAN H, 1966, 101 GEOL SOC AM SPEC, P218

[99] TAPPAN H, 1966 GEOL SOC AM SPE

[100] TEICHERT C, 1964, PROBLEMS PALAEOCLIMA, P597