Links
[1] https://ploughshares.org/sites/default/files/resources/PF%20YE21%20-%20Form%20990%20%28Public%20Disclosure%20Copy%29.pdf
[2] https://ploughshares.org/sites/default/files/resources/PF%20YE20%20-%20Form%20990%20%28Public%20Disclosure%20Copy%29_0.pdf
[3] https://ploughshares.org/sites/default/files/resources/PF%20YE19%20-%20Form%20990%20%28Public%20Disclosure%20Copy%29.pdf