共 7 条
[2]
DOESBURG JJ, 1952, CONSERVA, V1, P150
[3]
MATTSON S., 1946, Acta agriculturae Suecana, V2, P185
[4]
MATTSON S, 1950, ANN REV AGR COLL SWE, P40
[5]
RITMAN EL, 1948, PAPER IND, V29, P1751
[6]
SCHORMULLER J, 1956, DTSCH LEBENSM RUNDSC, V52, P213
[7]
SMOLDERS PM, 1955, 3 NETH EXP STN UT ST