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| D | prospective contributors | Individuals who have subscribed to BTA filling the relevant application form | * no priority bookings |
| C | contributors | Prospective contributors who have published their first article |
* personal page on the web * priority bookings |
| B | active contributors | Contributors who have published at least three articles and then at least two articles per year in both Italian and English |
* personal page on the web * priority bookings * BTA card |
| A | editors | Active contributors who participate in the editorial |
* personal page on the web * priority bookings * BTA card * Business cards |
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