Bibliography of Callahan, Philip S., by subject:

The number after the subject (topic or theme) tells how many books on this subject the author has. Please click on the subject to see books. Alternatively, you can see the alphabetically ordered bibliography of Callahan, Philip S..

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•	Insects -- Behavior (2)
•	Professional & Technical -- Engineering (2)
•	Animal communication (2)
•	Infrared radiation -- Physiological effect (2)
•	Science -- Earth Sciences -- Geography -- General AAS (1)
•	Literature & Fiction -- Contemporary (1)
•	Science -- Earth Sciences -- Geography -- General (1)
•	Science -- General (1)
•	Professional & Technical -- Professional Science -- Earth Sciences -- Geography (1)
•	Entomologists -- Colorado -- Biography (1)
•	Literature & Fiction -- General -- General (1)
•	Science -- General AAS (1)
•	Religion & Spirituality -- Occult (1)
•	Religion & Spirituality -- New Age -- Mental & Spiritual Healing (1)
•	Travel -- Europe -- Ireland (1)
•	Religion & Spirituality -- Christianity -- Theology (1)
•	Travel -- Asia -- General AAS (1)
•	Travel -- Asia -- General (1)
•	Birds (1)
•	Insects, Fossil (1)

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