1 "Ficheiro:Guide_to_the_study_of_insects_-_and_a_treatise_on_those_injurious_and_beneficial_to_crops_for_the_colleges,_farm-schools,_and_agriculturists_(IA_guidetostudyofin00packuoft).pdf".
Guide to the study of insects : and a treatise on those injurious and beneficial to crops for the colleges, farm-schools, and agriculturists ( ) Author...