  We present here an extension of our search for EISERS (Extremely Inverted
Spectrum Extragalactic Radio Sources) to the northern hemisphere. With an
inverted radio spectrum of slope $\alpha$ $>$ + 2.5, these rare sources would
either require a non-standard particle acceleration mechanism (in the framework
of synchrotron self-absorption hypothesis), or a severe free-free absorption
which attenuates practically all of their synchrotron radiation at metre
wavelengths. A list of 15 EISERS candidates is presented here. It was assembled
by applying a sequence of selection filters, starting with the two available
large-sky radio surveys, namely the WENSS (325 MHz) and the ADR-TGSS (150 MHz).
These surveys offer the twin advantages of being fairly deep (typical rms $<$
10 mJy/beam) and having a sub-arcminute resolution. Their zone of overlap
spreads over 1.3$\pi$ steradian in the northern hemisphere. Radio spectra are
presented for the entire sample of 15 EISERS candidates, of which 8 spectra are
of GPS type. Eleven members of the sample are associated with previously known
quasars. Information on the parsec-scale radio structure, available for several
of these sources, is also summarized.

Astrophysics of Galaxies