| Entry | Volume | Pages |
|---|---|---|
| Hecker, I.(Ione) M.: Dianthus | 41 | 44 |
| Hecker, I.(Ione) M.: Dwarf Achilleas | 36 | 154 |
| Hecker, I.(Ione) M.: Slovenian Holiday | 31 | 238 |
| Hecker, I.(Ione) M.: Some Interesting Crucifers | 43 | 118 |
| Hecker, I.(Ione) M.: Some Roscoeas | 38 | 263 |
| Hecker, I.(Ione) M.: The AGS Tour, 1959 | 27 | 357 |
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