form-10q-quarterly-report-june-2019

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Description Document
XBRL INSTANCE DOCUMENT zgsi-20190630.xml
XBRL TAXONOMY EXTENSION SCHEMA zgsi-20190630.xsd
XBRL TAXONOMY EXTENSION CALCULATION LINKBASE zgsi-20190630_cal.xml
XBRL TAXONOMY EXTENSION DEFINITION LINKBASE zgsi-20190630_def.xml
XBRL TAXONOMY EXTENSION LABEL LINKBASE zgsi-20190630_lab.xml
XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE zgsi-20190630_pre.xml