“…• library holdings such as the number of catalog entries per book title in WorldCat ® (Torres-Salinas and Moed, 2009), library bindings (Linmans, 2010), and even introducing an indicator of perceived cultural benefit (White et al, 2009) • document delivery requests (Gorraiz and Schlögl, 2006) • library loans (Cabezas-Clavijo et al, 2013) • publishers' prestige (Torres-Salinas et al, 2012, 2013Giménez-Toledo et al, 2013) • book reviews (Nicolaisen, 2002;Zuccala and Van Leeuwen, 2011;Gorraiz et al, 2014b;Bornmann, 2015;Kousha and Thelwall, 2015a,b;Zuccala et al, 2015;Kousha et al, 2016;Thelwall and Kousha, 2016;Zhou et al, 2016) • altmetrics (Zhou and Zhang, 2013).…”