1. Introduction
2. Classification and new names
3. Distribution
3.1. Geographical sequence
3.2. Abbreviations Canada and USA
3.3. Subdivision of present-day Russia
3.4. Abbreviations Australia
4. Gender
5. References
5.1. Printed catalogues
5.2. C.P. Alexander

5. References

The reference database contains 8391 references. It can be consulted by clicking the Literature tab at the top of the CCW.

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