(a) One frame for prim.;]f')" units. (bl one frame for holders. fhe fraMe for each Govenwrate .. was prepared on the basis of p.-etiminary field mission to ~very district. rhe purpose of the missions was to list sub-di!»tricts and villages. and enumer­ rft-e th~ popts1ation of each vi\~age on the ba:~.is of the informa­ tion contained io the regislers of the district authority. Sub-districts and villages wen' then cIa ss if i e:" i!ft:cord i ng to geographic contiguity. and additional data on the natur-e of the soil and prevailing 111eans of it·rigation was recor·ded in each sub-district to make way for defineation of st,-ata of comparable characteristics; and in each stratum so identified• artifical pri•ary 11nits of r-otJghly equivalent pf'oportions were composed on the basis of village registef's. On average. each artifical unit consisted of about 100 households (8Q-1201w comprising a whote village or part of a village* or yet severol smal~ villages. 4fter these units had been composede the sample of pr~mary units was selected from among them. thus completing the first stage. Before the census itserf could begin. the enumeratof' had to prepare a frame covering alt ho1ders and cof'r-esponding to each of the pri•ary units. whef'eupon questi'onnair (T-1) was filled o~t with the assistance of the ~heikh of the sub-district and ( . -3 - the notables of the villages comprising the ooit.. This ques­ tionnaire covered all households and provided information which hefped to evaluate the status of agricu1turaf hofders and cras­ sify them according to the size of their holdings (namely large., medium and small). In addition,. the questionnaire provided information on the nu~ber of members in each household and live­ stock comprised in its holding. From this list of ho1ders., the second-stage sample was selected as a source of data for the census itself. 