00510nam a2200157Ia 4500 0000006344 20251012174451.0 710915s1971 miua bs 000 0 eng HC28 .L3 330/.072/3 Economic survey methods [by] John B. Lansing and James N. Morgan. [Ann Arbor, Survey Research Center, University of Michigan] 1971. xii, 430 p illus 23 cm. Includes bibliographical references. Economic surveys. 4113 4113