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Bakos, G.A., Tremko, J.: 1977, `U Cephei and its outbursts in 1969 and 1974',
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Chochol, D., Zverko, J.: 1977, `Nabljudenija Novoj Lebedja 1975 na
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Chochol, D.: 1977, `Period changes of the early type eclipsing binary SZ
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Grygar, J., Hric, L., Chochol, D.: 1977, `Possible binary nature of the
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Hajduk, A.: 1977, `On the statistics of radar meteor echo durations', Acta
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Hajduk, A.: 1977, `Spektrum meteoru a trvanie meteorickej stopy', in: 16.
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Kapisinsky, I.: 1977, `Akusticka detekcia mikrometeoroidov', in: Zbornik zo
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Kresak, L.: 1977, `An alternate interpretation of the Oort Cloud of comets?',
in: Comets, Asteroids, Meteorites, ed. A. H. Delsemme, Toledo, Ohio, pp. 93-97.

Kresak, L.: 1977, `Asteroid versus comet discrimination from orbital data',
in: Comets, Asteroids, Meteorites, ed. A. H. Delsemme, Toledo, Ohio, pp.
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Kresak, L.: 1977, `Mass content and mass distribution of the asteroid system',
Bull. Astron. Inst. Czechosl. 28, 65-82.

Kresak, L.: 1977, `On the differences between the new and old comets', Bull.
Astron. Inst. Czechosl. 28, 346-355.

Kresakova, M., Porubcan, V., Stohl, J.: 1977, `O aktivite Geminid z pozorovani
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Mcintosh, B.A., Hajduk, A.: 1977, `Sunrise effect on persistent radar echoes
from sporadic meteors', Bull. Astron. Inst. Czechosl. 28, 280-285.

Mogilevskij, E.I., Utrobin, V.G., Sykora, J.: 1977, `Polarization of the
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Porubcan, V.: 1977, `Dispersion of the orbital elements within the Perseid
meteor stream', Bull. Astron. Inst. Czechosl. 28, 257-266.

Porubcan, V.: 1977, `Drahy meteorov', in: Hvezdarska rocenka 1978, eds. J.
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Rybansky, M.: 1977, `Coronal index of the solar activity Ia', Contrib. Astron.
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Rybansky, M.: 1977, `Reduced intensities of the coronal line 5303 A observed
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Sykora, J., Mogilevskij, E.I., Utrobin, V.G.: 1977, `Polarization in the
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Sykora, J., Mogilevskij, E.I., Utrobin, V.G.: 1977, `Polarization in the
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Sykora, J.: 1977, `Polarization of the white light corona during solar eclipse
of June 30, 1973', Bull. Astron. Inst. Czechosl. 28, 312-316 + 4 strany
prilohy.

Tremko, J., Bakos, G.A.: 1977, `The light curve and orbital elements of TV
Cassiopeae', Bull. Astron. Inst. Czechosl. 28, 41-61.

Tremko, J.: 1977, `The massive stars among binary systems', in: Non stable
stages in the evolution of massive stars, ed. N. S. Nikolov, Bulg. Acad. Sci.,
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Zverko, J., Chochol, D.: 1977, `Nabljudenija N Cyg 1975', Astron. Zh. 54,
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