Китоб пас аз сабти ном дастрас аст.
| Номи китоб: | The Observer |
| Муаллиф: | Clifford D. Simak, |
| Соли нашр: | 1972 |
| Теъдоди саҳифаҳо: | Не известно |
| To make a workable data-gathering system, you must understand what kind of information is being sought, why it's being sought, and — ultimately — who is the seeker. |