Zobrazeno 1 - 10
of 10
pro vyhledávání: '"W. B. G Jacobsen"'
Autor:
W. B. G Jacobsen, N. H. G. Jacobsen
Publikováno v:
Bothalia: African Biodiversity & Conservation, Vol 18, Iss 1, Pp 90-92 (1988)
DORYOPTERIS PILOSA, A NEW RECORD FOR SOUTH AFRICA
Externí odkaz:
https://doaj.org/article/425b45832d5a465f95c2c86a5002284e
Autor:
W. B. G Jacobsen, N. H. G. Jacobsen
Publikováno v:
Bothalia: African Biodiversity & Conservation, Vol 16, Iss 1, Pp 41-42 (1986)
CHEILANTHES DELTOIDEA KUNZE IN THE WATERBERG, TRANSVAAL
Externí odkaz:
https://doaj.org/article/027c47ebf36e4a958ec0551c85b3b348
Autor:
W. B. G. Jacobsen, N. H. G Jacobson
Publikováno v:
Bothalia: African Biodiversity & Conservation, Vol 18, Iss 1, Pp 57-77 (1988)
The very variable complex of plants until now ascribed to Cheilanthes hirta Swartz, together with some derived or allied species, is investigated. The type of the species as established by N. C. Anthony (1984), is accepted. Three new varieties are di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::d2442f10614d298df13b98abc462a871
https://abcjournal.org/index.php/abc/article/view/982
https://abcjournal.org/index.php/abc/article/view/982
Autor:
N. H. G Jacobson, W. B. G. Jacobsen
Publikováno v:
Bothalia. 18:57-77
The very variable complex of plants until now ascribed to Cheilanthes hirta Swartz, together with some derived or allied species, is investigated. The type of the species as established by N. C. Anthony (1984), is accepted. Three new varieties are di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cde454b1a00cb6fd088513d05e90aef5
https://doi.org/10.4102/abc.v18i1.982
https://doi.org/10.4102/abc.v18i1.982
Autor:
W. B. G. Jacobsen
Publikováno v:
Geologische Rundschau. 53:870-895
Following the author's previous paper on the broad outline of the Geology of the Mangula Copper Deposits (Jacobsen, in print), a few of the more complex problems of mineralisation are discussed. Introduction of iron, manifested by widespread, often s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dec2b749ef7179fae06e4a6417cec76d
https://doi.org/10.1007/bf02054569
https://doi.org/10.1007/bf02054569
Autor:
W. B. G. Jacobsen
Publikováno v:
Geologische Rundschau. 58:908-929
Results obtained during detailed geological investigations in the Silverside area of the Lomagundi District, Rhodesia, call for certain changes in the stratigraphical sequence of the late Precambrian Lomagundi System. They confirm in principle a new
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39fb6ad3d76a162870bb35c340ad9d3a
https://doi.org/10.1007/bf01820738
https://doi.org/10.1007/bf01820738
Autor:
W. B. G. Jacobsen, Joseph M. Beitel
Publikováno v:
Brittonia. 39:143
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a51e69b85f097981a3d65a7fb05bf10
https://doi.org/10.2307/2806990
https://doi.org/10.2307/2806990
Autor:
James D. Montgomery, W. B. G. Jacobsen
Publikováno v:
American Fern Journal. 75:31
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c5f74e4ce136374553a09d8880c7263
https://doi.org/10.2307/1546581
https://doi.org/10.2307/1546581
Autor:
B. S. Parris, W. B. G. Jacobsen
Publikováno v:
Kew Bulletin. 40:239
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69e4c54df7769caa4e88113c97c315af
https://doi.org/10.2307/4108502
https://doi.org/10.2307/4108502
Autor:
W. B. G. Jacobsen, N. H. G. Jacobsen
Publikováno v:
Bulletin du Jardin botanique national de Belgique / Bulletin van de National Plantentuin van België. 59:261
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfaf71739840a2ded5397657c64e1a5f
https://doi.org/10.2307/3668347
https://doi.org/10.2307/3668347