Litwin, Ronald J.
51  Ergebnisse:
Personensuche X
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10

Two New Species of the Pinnate Microsporophyll Pramelreuthi..:

Ash, Sidney ; Litwin, Ronald J.
American Journal of Botany.  83 (1996)  8 - p. 1091-1099 , 1996
 
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11

Reexamination of the fossil fern genus Dryopterites Berry b..:

Skog, Judith E. ; Litwin, Ronald J.
Review of Palaeobotany and Palynology.  89 (1995)  3-4 - p. 235-256 , 1995
 
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13

Revision of the biostratigraphy of the Chatham Group (Upper..:

Litwin, Ronald J. ; Ash, Sidney R.
Review of Palaeobotany and Palynology.  77 (1993)  1-2 - p. 75-95 , 1993
 
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15

Preliminary palynological zonation of the Chinle formation,..:

Litwin, Ronald J. ; Traverse, Alfred ; Ash, Sidney R.
Review of Palaeobotany and Palynology.  68 (1991)  3-4 - p. 269-287 , 1991
 
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