Proceedings of the International Society of Soil Science / 
Central Organ of Soil Science. 
 - Berlin :  Executive Committee of the International Society of Soil Science,  1929. 
 - V. ;  25 cm. 
<br/><br/> Vol./Bd. IV, No 2.(1929, 184 p.)  Vol./Bd. IV, No 3.(1929, 276 p.)  Vol./Bd. IV, No 4.(1929, 414 p.)  Vol./Bd. V, No 2.(1930, 151 p.)  Vol./Bd. V, No 4.(1930, 250 p.)  Vol./Bd. VI, No 1.(1931, 49 p.)  Vol./Bd. VI, No 3.(1931, 140 p.)  Vol./Bd. VI, No 4.(1931, 171 p.)  Vol./Bd. VII, No 4.(1932, 284 p.)  Vol./Bd. VIII, No 2.(1933, 128 p.)  Vol./Bd. VIII, No 4.(1933, 242 p.)  Vol./Bd. IX, No 1.(1934, 62 p.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science