Mendonça, R. A., Oliveira, C. B. M., Oliveira, A. J. S., & daSilva Jr., J. F. (2020). Orientation for Field Activity Planning: Contributions of P. Ya.Galperin. International Journal of Advanced Engineering Research and Science, 7(5). https://journal-repository.com/index.php/ijaers/article/view/1977