Attachment: 8-K


amt-20200213.xsd
Attachment: XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT


amt-20200213_cal.xml
Attachment: XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT


amt-20200213_def.xml
Attachment: XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT


amt-20200213_lab.xml
Attachment: XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT


amt-20200213_pre.xml
Attachment: XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT