TY - RPRT TI - Tracking trends in monarch abundances over the 20th century is currently impossible using museum records: a response to Boyle et al. (2019) AU - Ries, L. AU - Zipkin, E. F. AU - Guralnick, R. P. PY - 2019 DO - 10.1101/581801 UR - https://www.biorxiv.org/content/10.1101/581801v1 ID - 10.1101/581801 ER -