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Tag Indicator Content
020 ## $a92-5-100721-7
041 ## $aEnglish
110 ## $aFAO
245 00 $aChina: azolla propagation and small-scale biogas technology $cFAO
260 ## $aRome $bFAO $c1978
300 ## $axii, 81 p. $bfig., table $c27 cm
440 #0 $aSoils Buttelin $c41