Amos Arthur Heller (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Amos Arthur Heller" in English language version.

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bioone.org

Jordan, H.E. (February 1908). "The Pennsylvania-German As Biologist". The Penn Germania: A Popular Journal of German History and Ideals in the United States. IX (2). Cleona, PA: Holzapfel Publishing Company: 63.

"Plants of Porto Rico: IndExs ExsiccataID=309176960". IndExs – Index of Exsiccatae. Botanische Staatssammlung München. Retrieved October 3, 2024.
"Plants of the Hawaiian Islands: IndExs ExsiccataID=1280336383". IndExs – Index of Exsiccatae. Botanische Staatssammlung München. Retrieved October 3, 2024.
"Flora of Central Pennsylvania: IndExs ExsiccataID=2147199930". IndExs – Index of Exsiccatae. Botanische Staatssammlung München. Retrieved October 5, 2024.

Triebel, D. & Scholz, P. 2001–2024 IndExs – Index of Exsiccatae. Botanische Staatssammlung München: http://indexs.botanischestaatssammlung.de. – München, Germany.