Preliminary Report on the World Social Situation

1953 ◽  
Vol 31 (3) ◽  
pp. 359
Author(s):  
Charles F. Westoff ◽  
Department of Social Affairs United Nations
Keyword(s):  
Preliminary Report ◽  
Social Situation ◽  
The World

Preliminary Report on the World Social Situation.

Economica ◽  
1954 ◽  
Vol 21 (81) ◽  
pp. 82 ◽  
Author(s):  
Vera Anstey ◽  
United Nations
Keyword(s):  
Preliminary Report ◽  
Social Situation ◽  
The World

Preliminary Report on the World Social Situation

1953 ◽  
Vol 35 (3) ◽  
pp. 453 ◽  
Author(s):  
Ernest Feder ◽  
United Nations
Keyword(s):  
Preliminary Report ◽  
Social Situation ◽  
The World

Evolution and environment in the late Silurian-early Devonian: the rise of the pteridophytes

1985 ◽  
Vol 309 (1138) ◽  
pp. 147-165 ◽  
Keyword(s):  
Vascular Plants ◽  
Preliminary Report ◽  
Life Histories ◽  
Early History ◽  
Flora Of Australia ◽  
Early Devonian ◽  
The World ◽  
History Of

A brief review of the major advances since 1979 in Silurian and Devonian palaeobotany is followed by a preliminary report on a Gedinnian assemblage from the Welsh Borderland. This is dominated by rhyniopsids and includes several species of Cooksonia and Salopella . Spores have been isolated from a number of taxa. The assemblage is used to illustrate the problems of recognition and classification of early vascular plants. Parallel sedimentological and palaeogeographical studies permit speculation on the ecology and life histories of the plants that colonized the Old Red Continent. It is concluded that the lack of well preserved and independently dated assemblages from elsewhere in the world (an exception being the Baragwanathia flora of Australia) prevents the detection of any provincialism in the late Silurian and early Devonian and makes generalizations on the early history of vascular plants premature.

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