Statistical services directory: A guide to the organizations, corporations, professional and trade associations, research centers, univercities, publishres, foundations, and government agencies that provide statistical services (Second edition.). Detroit: Gale research Company.
Παραπομπή Chicago StyleStatistical Services Directory: A Guide to the Organizations, Corporations, Professional and Trade Associations, Research Centers, Univercities, Publishres, Foundations, and Government Agencies That Provide Statistical Services. Second edition. Detroit: Gale research Company.
Παραπομπή MLAStatistical Services Directory: A Guide to the Organizations, Corporations, Professional and Trade Associations, Research Centers, Univercities, Publishres, Foundations, and Government Agencies That Provide Statistical Services. Second edition. Detroit: Gale research Company.