| Tag | Indicator | Content |
|---|---|---|
| 020 | ## | $a0-12-656560-0 |
| 041 | ## | $aEnglish |
| 082 | ## | $a631.5 |
| 100 | 0# | $aC. R. W. Spedding$a J. M. Walsingham and A. M. Hoxey |
| 245 | 00 | $aBiological efficiency in agriculture |
| 260 | ## | $aLondon $bAcademic $c1981 |
| 300 | ## | $ax, 383 p. $billus., tables $c24 cm |
| 500 | ## | $aIncludes index. |
| 650 | 00 | $aFIELD CROPS - Physiology, FIELD CROPS - Production |