Vinal, William Gould. "PART III: SUGGESTIONS FOR SOME NATURE-STUDY LESSONS". Nature Guiding, Ithaca, NY: Cornell University Press, 2019, pp. 351-492. https://doi.org/10.7591/9781501740862-006
Vinal, W. (2019). PART III: SUGGESTIONS FOR SOME NATURE-STUDY LESSONS. In Nature Guiding (pp. 351-492). Ithaca, NY: Cornell University Press. https://doi.org/10.7591/9781501740862-006
Vinal, W. 2019. PART III: SUGGESTIONS FOR SOME NATURE-STUDY LESSONS. Nature Guiding. Ithaca, NY: Cornell University Press, pp. 351-492. https://doi.org/10.7591/9781501740862-006
Vinal, William Gould. "PART III: SUGGESTIONS FOR SOME NATURE-STUDY LESSONS" In Nature Guiding, 351-492. Ithaca, NY: Cornell University Press, 2019. https://doi.org/10.7591/9781501740862-006
Vinal W. PART III: SUGGESTIONS FOR SOME NATURE-STUDY LESSONS. In: Nature Guiding. Ithaca, NY: Cornell University Press; 2019. p.351-492. https://doi.org/10.7591/9781501740862-006