interview with In Search of Aztlán on August 8, 1999 http://www.insearchofaztlan.com/gutierrez.html
José Ángel Gutiérrez: Frases en inglés
page 10523 of HOUSE OF REPRESE.NTATIVES-Monday, April 28, 1969. This is on page 27/99 of the part 8-5 PDF https://www.gpo.gov/fdsys/pkg/GPO-CRECB-1969-pt8/pdf/GPO-CRECB-1969-pt8-5.pdf ( archive http://archive.is/753l4). According to Behnken this was said "a few weeks later" to clarify the preceding MAYO rally quote. Gonzalez describes it as "Last Tuesday, at Kingsville" indicating it was said 22 April 1969.
from videotape referenced in 16 April 2008 Washington Post article Mexican aliens seek to retake ‘stolen’ land https://www.washingtontimes.com/news/2006/apr/16/20060416-122222-1672r/
quoted in "Racial Tactics Backfire", an article on page 12 of Texas Monthly Vol. 4 No. 7, July 1976 https://books.google.ca/books?id=zCwEAAAAMBAJ&pg=PA12. According to Brian B. Behnken on page 184 of the 2011 book Fighting Their Own Battles: Mexican Americans, African Americans, and the Struggle for Civil Rights in Texas https://books.google.ca/books?id=SYoy9QhqvloC&pg=PA184 this was said at a MAYO rally in 1969.