1927- 1927-1993 20thcentury agriculturallaborers american americanpoetry biography california cesar chavez children'spoetry christianity churchandsocialproblems churchhistory churchworkwithmigrantlabor history historynationalfarmworkersassociation historyunitedfarmworkers historyunitedfarmworkersorganizingcommittee illegalaliens juvenileliterature juvenilepoetry laborleaders laborunions mexicanamericans migrantagriculturallaborers migrantlabor officialsandemployees poetry religiousaspects socialconditions solidarity texas unitedfarmworkers unitedstates