Dear PCC Colleagues, Can anyone give me advice on how to manage dates on 046 field on this complicated case? I need to create an authority record for CH2M Firm. Here is the salient info: CH2M was founded in 1946, became CH2M HILL after a merger in 1971. Over the year the company has acquired a long string of other engineering firms: 1977: acquired Black, Crow & Eidsness, August 2002, acquired Gee & Jensen, DeMil International, and EHS Consultants Ltd., October 2005, acquired BBS Corporation, in Sept 2007, acquired most of the components of VECO; in December 2007, acquired Trigon EPC; in March 2008, acquired Goldston Engineering, in October 2014 acquired TERA Environmental Consultants. However, in April 2015, the company officially removed the word "Hill" from its name. This would constitute a name change, and we have a publication under the new name: CH2M. Then, in December 2017, Jacobs Engineering Group acquired CH2M. Please advise. Thank you, Alla Kroychik E-resources Access and Discovery Professional Auraria Library 1100 Lawrence St, Denver, CO 80204 Phone 303.315.7739 | Fax 303.315.7774 [log in to unmask]<mailto:[log in to unmask]> Serving the University of Colorado Denver, Metropolitan State University of Denver, and Community College of Denver