共 38 条
[21]
Peppers R. A., 1964, ILL STATE GEOL SURV, V90, P1
[22]
Phillips T. L, 1977, INTERDISCIPLINARY ST, V7, P18
[26]
Potonie R., 1956, PALAEONTOGR ABT B, V99, P85
[27]
Potonie R., 1955, PALAEONTOGRAPHICA B, V98, P1
[28]
HERBACEOUS CARBONIFEROUS LYCOPOD SELAGINELLA FRAIPONTI COMB NOV
[J].
BOTANICAL GAZETTE,
1969, 130 (01)
:35-+
[29]
Schopf J. M., 1938, ILL STATE GEOL SURV, V50
[30]
SCHOPF JM, 1941, ILL STATE GEOL SURV, V75