Title: Adventures with a Microscope, Author: Richard Headstrom
Title: Adventures with a Hand Lens, Author: Richard Headstrom
Title: Birds' Nests of the West - An Identification Manual to the Nests of Birds of the United States West of the One Hundredth Meridian, Author: Richard Headstrom
Title: Identifying Animal Tracks: Mammals, Birds, and Other Animals of the Eastern United States, Author: Richard Headstrom
Title: The Living Year (Yesterday's Classics), Author: Richard Headstrom