| Author | NULL |
| Title | Седмичен бюлетин |
| Subtitle Data | |
| Physical media | № 53, 19 март 1991, с. 3. |
| Place of publishing | За състоянието на въздуха в Русе, включително хлор и хлорен йон, за периода 7 – 14 март 1991 г., по данни на РИОПС |
| Publisher Name | Утро |
| Year of issue | |
| Capital Letter | |
| Systematic-alphabetic signature | 500563 |
| Temporary collective author | |
| Venue of the event | |
| Date of the conference, seminar, etc. | |
| A form of digitalisation | Scan |
| Note |
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