Concerning betulin, III. (Preliminary.) Announcement.

[1] POSTOWSKY, 1929, J RUSS PHYS CHEM GES, V62, P101

[2] 1912, J RUSS PHYS CHEM GES, V44, P1202

[3] 1927, ARK KEMI MINERAL, V9

[4] 1912, J RUSS PHYS CHEM GES, V44, P132

[5] 1926, MONATSH CHEM, V47, P419

[6] 1929, MONATSH CHEM, V51, P54

[7] 1932, HELV CHIM ACTA, V15, P472

[8] 1932, HELV CHIM ACTA, V15, P634

[9] 1932, HELV CHIM ACTA, V15, P642

[10] 1932, HELV CHEM ACTA, V15, P634

[1] POSTOWSKY, 1929, J RUSS PHYS CHEM GES, V62, P101

[2] 1912, J RUSS PHYS CHEM GES, V44, P1202

[3] 1927, ARK KEMI MINERAL, V9

[4] 1912, J RUSS PHYS CHEM GES, V44, P132

[5] 1926, MONATSH CHEM, V47, P419

[6] 1929, MONATSH CHEM, V51, P54

[7] 1932, HELV CHIM ACTA, V15, P472

[8] 1932, HELV CHIM ACTA, V15, P634

[9] 1932, HELV CHIM ACTA, V15, P642

[10] 1932, HELV CHEM ACTA, V15, P634