| Entry | Volume | Pages |
|---|---|---|
| Wale, Dr. R.S.: Anatolian Semperviva | 10 | 233 |
| Wale, Dr. R.S.: Caucasian Semperviva | 10 | 83 |
| Wale, Dr. R.S.: Semperviva of the Balkan Peninsula | 8 | 200 |
| Wale, Dr. R.S.: Some new Sempervivums from the Balkans | 6 | 97 |
| Wale, Dr. R.S.: Some new Spanish Semperviva | 9 | 109 |
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