APPEARANCE OF GYMNOSPERMOUS STRUCTURE

[1] ANDREWS H N, 1968, Journal of the Linnean Society of London Botany, V61, P37

[2] Andrews H.N, 1961, STUDIES PALEOBOTANY, P487

[3] PALEOBOTANICAL STUDIES IN ARCTIC CANADA .1. ARCHAEOPTERIS FROM ELLESMERE ISLAND [J]. CANADIAN JOURNAL OF BOTANY, 1965, 43 (05): : 545 - &

[4] Arnold C. A., 1930, PAP MICH ACAD SCI, V11, P1

[5] On the radial pitting in Callixylon [J]. AMERICAN JOURNAL OF BOTANY, 1929, 16 (06) : 391 - 393

[6] ARNOLD CA, 1936, CONTRIBUTIONS MUSEUM, V5, P49

[7] ARNOLD CHESTER A., 1931, CONTRIB MUS PALEONT UNIV MICHIGAN, V3, P207

[8] BANKS HP, 1968, EVOLUTION ENVIRONMEN, pCH2

[9] BECK C B, 1966, Taxon, V15, P337, DOI 10.2307/1217162

[10] Beck C.B., 1967, PALAEONTOGR ABT B, VB 121, P1

[1] ANDREWS H N, 1968, Journal of the Linnean Society of London Botany, V61, P37

[2] Andrews H.N, 1961, STUDIES PALEOBOTANY, P487

[3] PALEOBOTANICAL STUDIES IN ARCTIC CANADA .1. ARCHAEOPTERIS FROM ELLESMERE ISLAND [J]. CANADIAN JOURNAL OF BOTANY, 1965, 43 (05): : 545 - &

[4] Arnold C. A., 1930, PAP MICH ACAD SCI, V11, P1

[5] On the radial pitting in Callixylon [J]. AMERICAN JOURNAL OF BOTANY, 1929, 16 (06) : 391 - 393

[6] ARNOLD CA, 1936, CONTRIBUTIONS MUSEUM, V5, P49

[7] ARNOLD CHESTER A., 1931, CONTRIB MUS PALEONT UNIV MICHIGAN, V3, P207

[8] BANKS HP, 1968, EVOLUTION ENVIRONMEN, pCH2

[9] BECK C B, 1966, Taxon, V15, P337, DOI 10.2307/1217162

[10] Beck C.B., 1967, PALAEONTOGR ABT B, VB 121, P1