The main scientific goal of this proposal is to understand the
 scenario of star formation and early stellar evolution within a
 few selected molecular clouds. We intend to perform photometric
 observations the young stellar object (YSO) population revealed by
 IRAS in three star forming  clouds. Using broad-band multi-filter
 photometry with ISOPHOT, we intend to derive the spectral energy
 distributions and luminosities of IRAS point sources in the clouds
 Lynds 1188, 1251 and 1340. These quantities are suitable for finding
 the evolutionary stages and mass spectrum of a YSO population in the
 clouds.  IRAS sources in three clouds in Cepheus - Cassiopeia region
 were chosen for this study: L1188, L1251 and L1340. YSO population,
 as well as distance, mass and structure are well established for these
 clouds. The objects selected for observations do not belong to the
 frequently observed YSOs. Their study will broaden the list of well
 studied objects in star forming regions which makes the comparison of
 various star forming regions possible. We intend to perform broad-band
 multi-filter photometry in the 3 - 240 micrometer wavelength region.
 Because the sensitivity of ISO is much higher than IRAS we expect
 to obtain good quality fluxes for the selected objects in the whole
 wavelength region. In this way we have a homogeneous data set for the
 whole known YSO population of the clouds suitable for determining the
 evolutionary stage and the mass function of the young stellar groups.
 Each object is intended to be observed with the same filter set.
 ISOCAM observations are aimed at revealing wide binaries and small
 groups suspected on the basis of studying IRAS raw data.