The phrase "an impression of which" is correct and usable in written English.
It can be used when referring to a specific impression related to a previously mentioned subject or object.
Example: "The painting left an impression of which I could not shake off for days."
Alternatives: "an impression that" or "a feeling about which".
Figure 3 delineates some of the cooperation that gives an impression of synergies which are often experienced.
The hair can be somehow tangled, the nails are not well-groomed, the clothes, the accessories remain and help producing an impression of reality which leaves its identity to each image.
This study gives a first impression of which quality indicators could be presented as comparative healthcare information for patients choosing a hospital for THA/TKA.
This study gives a first impression of which quality indicators are most important from the patient's perspective: the conduct of doctors, the existence of procedures to prevent adverse effects of thrombosis, and the specialist area of orthopaedists.
We compared the expression at the mRNA level in arthritic knee joints of two animals on day 3 and two animals on day 14 with the expression in knee joints of two control mice on day 0. By oligonucleotide chip technology we obtained a first impression of which MMPs, TIMPs, cathepsins and cystatins were strongly and differentially expressed in murine knee joints (Table 2).
57 Furthermore, that no engraver of seals should be allowed to retain an impression of the ring which he has sold, and that the penalty for depriving a one‑eyed man of his single eye should be the loss of the offender's two eyes.
Nevertheless it is instructive to consider in more detail the discrepancies between the simulated relative frequencies of the digits and their theoretical values to get an impression of the precision which can be expected from the simulation study.
However, a barium contrast examination of the esophagus made at the age of 6 years revealed an impression of the esophagus which suggested an ARSA (Fig. 1).
You can also give an impression of the article, which begins and sets up your critique.
At best, you'd risk giving voters the wrong impression of which candidate was ahead.
