The sa•p1e of hotders was selected in two stages: Ei£~~!~9~! A sample of primary units was selected from the frame of artificial primary units coJRposed in each stratum. The sample was selected by systematic., random drawing., compris­ ing 5 per cent of the primary units in Dhamar, Al-Ffodeiaah ana Ibb., aAd 10 per cent of those in Sana•a., Hajja., AI-Mahweet., Taiz., Ma•reb., Fa•ada., A1-3eida and Al-Jowf. ~~£~~- st~g~! Following the preparation of a frame of holders for each of the primary units comprising the sample obtained in the first stage.,. the enumerator selected 20 per cent of Uw holders in each unit by systematic random drawing., first,. from the column of large holdings., then from that of medium holdings and, lastly from that of small holdings. The sample of holders thus selected was tl'len used' to collect data for the cen­ sus. The final sample was appnJxicwately l per cent in Ohamar. At-Hodeidah and Ibb., and about 2 per cent in HajJaw Al-Mahweet, Taize Fa*ada, Af-Beida, Sana•a• AJ-.Jowf and Ma•reb. In eac:h proYincE:~., the cens.u~ invofv;:!d th~':' fo11o~ing oper­ ation!»: (1 f Es taoli shment of contact with the prov H•C.C Govt::l no..-artd obtention of di..-ectives ~nstructing the district chjefs to facilitdte the census. tZJ Establishment of contact with the district chiefs and obtention of orders instructing ·the Sheikhs dHd .~ • .)to:11i:de::. uf vil­ lages in the sample of statistical units to co-~pcrat~ with enu­ meri'rtor-s. (3} Establishment of contact with these off~cia~s. w'th a vie~ of explaining task of the enu~rator. {4} Enumeration of agricultural hoTders in the un1r. ny ~n•J­ m~rating all households in questionnaire (T-i' dnrl cr~,sifira­ tion into large. medium and small holdings accor~i~~ ~~ th~ statements of officials in the unit. -4 -
**Analysis**
The text appears to be related to a statistical survey or census, specifically focused on agricultural holders and their units. The language used is technical and formal, indicating a professional or academic context. The text does not mention economic development, natural resources, or international trade, which are often linked to agricultural activities. However, it does seem to be related to agriculture, as it involves enumeration of agricultural holders and their units.

**Category**
Agriculture, forestry and fishing