ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Before fossil or archaeological specimens can be compared with contemporary animals it is necessary to know the extent of variation which occurs in recent material. A knowledge of such variation is also interesting from the taxonomic point of view. Even now species are sometimes created, combined ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/221059b0