Fossil plants, Vol. 2: A text-book for students of botany and geology

by A. C. Seward

[172] Solms-Laubach (91) A. p. 137.

[173] Zeiller (06) p. 140.

[174] Halle (07).

[175] Brongniart (22) A. p. 304, Pl. VI, fig. 1.

[176] Brongniart (28) A. p. 83.

[177] Brongniart (49) A. p. 40.

[178] Goldenberg (55) p. 9.

[179] Lesquereux (84) A. p. 777.

[180] Kidston (86³) p. 561.

[181] Halle (07).