000 | 00356nam a2200121Ia 4500 | ||
---|---|---|---|
008 | 151015s9999 xx 000 0 und d | ||
100 | _aYang, W. Y. | ||
245 |
_aMethods of farm management investigations _bfor improving farm productivity |
||
260 | _c1958 | ||
300 | _aix 228p. | ||
500 | _aFAO agricultural development paper no- 64 | ||
942 |
_cFAO _2udc |
||
999 |
_c25057 _d25057 |