| Citation | Gambles, R.M. 1987 Hagen's tubercle, a largely overlooked but potentially useful character in Gomphid taxonomy (Anisoptera: Gomphidae). Odonata; Hagen's tubercle; Gomphidae; taxonomy. Advances in Odonatology 3:51-60. |
| DOI / ISBN | |
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| Ref. No. | 84936 |
| Language | English |
| Usage | not used yet |
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