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{\bf Abstract Registration Number 520} \\
{\bf Parallel sessions: 3,5} \\
{\bf Plenary sessions: 5,7}
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\abstractheader{\bf Measurement of Dijet Cross Sections in 
Deep Inelastic Scattering \\ at HERA \\
H1 Collaboration, DESY}

\abstractbody{
Dijet cross sections in deep-inelastic scattering have been measured with 
the H1 detector at the positron proton collider HERA using data taken
in the years 1994 -- 1997, corresponding to an integrated luminosity of
${\cal L}_{int} \simeq 36\;\mbox{pb}^{-1}$.
A large kinematical range of four momentum transfers 
$10 < Q^2 < 5000\;\mbox{GeV}^2$, transverse jet energies
$70 < E^2_{t,jet,Breit} < 1200\;\mbox{GeV}^2$ and
invariant dijet masses $200 < M^2_{jj} < 7000\;\mbox{GeV}^2$
is covered. \\
For the first time in this kinematical region double differential 
dijet cross sections have been measured for several sets of variables
($Q^2, E_{t,jet,Breit}, M_{jj}, \xi, x_{Bj}$).
The results are compared to next-to-leading calculations.
Over the whole phase space the next-to-leading predictions give a 
very good description of the data. \\
The sensitivity to theoretical parameters is demonstrated and 
QCD fits are performed.
}

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