Publisher: Loodus. Published: 1937

Publisher: Loodus. Published: 1936

Publisher: V. Tamman. Published: 1934

Publisher: V. Tamman. Published: 1935

Publisher: V. Tamman. Published: 1931

Publisher: V. Tamman. Published: 1928

Publisher: V. Tamman. Published: 1930

Publisher: V. Tamman. Published: 1932

Publisher: V. Tamman. Published: 1926

Publisher: V. Tamman. Published: 1933