EARLY VASCULAR LAND PLANTS - PROOF AND CONJECTURE

[51] Mortimer M. G., 1972, B GEOLOGICAL SURVEY, V39, P1

[52] SOME FOSSILIFEROUS PRE-CAMBRIAN CHERT PEBBLES WITHIN TORRIDONIAN OF BRITAIN [J]. NATURE, 1970, 226 (5244) : 443 - &

[53] Neish A., 1968, CONSTITUTION BIOSYNT, P3

[54] Neish A.C., 1964, FORMATION WOOD FORES, P219

[55] MORPHOLOGY OF PROTOSALVINIA FROM UPPER DEVONIAN OF OHIO AND KENTUCKY [J]. AMERICAN JOURNAL OF BOTANY, 1976, 63 (01) : 9 - 29

[56] NYE O B JR, 1975, Bulletins of American Paleontology, V67, P287

[57] O'Colla P. S., 1962, PHYSL BIOCH ALGAE, P337

[58] PARKER BRUCE C., 1965, NOVA KEDWIGIA Z KRYPTOGAMENK, V10, P273

[59] MORPHOLOGY AND VERTICAL DISTRIBUTION OF PROTOSALVINIA (FOERSTIA) FROM NEW ALBANY SHALE (UPPER DEVONIAN) [J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY, 1972, 14 (1-2) : 171 - &

[60] PICKETTHEAPS JD, 1974, CYTOBIOS, V11, P41

[51] Mortimer M. G., 1972, B GEOLOGICAL SURVEY, V39, P1

[52] SOME FOSSILIFEROUS PRE-CAMBRIAN CHERT PEBBLES WITHIN TORRIDONIAN OF BRITAIN [J]. NATURE, 1970, 226 (5244) : 443 - &

[53] Neish A., 1968, CONSTITUTION BIOSYNT, P3

[54] Neish A.C., 1964, FORMATION WOOD FORES, P219

[55] MORPHOLOGY OF PROTOSALVINIA FROM UPPER DEVONIAN OF OHIO AND KENTUCKY [J]. AMERICAN JOURNAL OF BOTANY, 1976, 63 (01) : 9 - 29

[56] NYE O B JR, 1975, Bulletins of American Paleontology, V67, P287

[57] O'Colla P. S., 1962, PHYSL BIOCH ALGAE, P337

[58] PARKER BRUCE C., 1965, NOVA KEDWIGIA Z KRYPTOGAMENK, V10, P273

[59] MORPHOLOGY AND VERTICAL DISTRIBUTION OF PROTOSALVINIA (FOERSTIA) FROM NEW ALBANY SHALE (UPPER DEVONIAN) [J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY, 1972, 14 (1-2) : 171 - &

[60] PICKETTHEAPS JD, 1974, CYTOBIOS, V11, P41