Kenneth P. Sheldon

• Provincial economic surveys, Mindanao area series, The Province of Agusan
• Provincial economic surveys, Mindanao area series, The Province of Bukidnon
• Provincial economic surveys, Mindanao area series, The Province of Misamis Occidental
• Provincial economic surveys, Mindanao area series, The Province of Surigao
• Provincial economic surveys, Mindanao area series, The Provinces of Lanao Del Norte & Lanao Del Sur