Title: Bat guanos of Porto Rico and their fertilizing value
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF005491042&ix=pm&I=0&V=D&pm=1" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF005491042&ix=pm&I=0&V=D&pm=1</a>
Subjects: Guano, Organic wastes as fertilizer--Puerto Rico.