You can see full article at https://journals.lww.com/greenjournal/Transfer_of_Inhaled_Cannabis_Into_Human_Breast.5.aspx. 

You can also download it in PDF format HERE.

Baker T, Datta P, Rewers-Felkins K, Thompson H, Kallem RR, Hale TW. Transfer of Inhaled Cannabis Into Human Breast Milk. Obstet Gynecol. 2018

May;131(5):783-788. PubMed PMID: 29630019.